Falconry & Wildlife Tracking Transmitters Built for Real-World Recovery
Since 1974, L.L. Electronics transmitters have been trusted by falconers, dog handlers, wildlife researchers, and recovery specialists worldwide. Whether you need maximum output power, extended battery life, or ultra-lightweight performance, our LF Series transmitters are engineered for dependable field use.
Choose the Right Transmitter
Compare output power, battery life, and ideal use to find the right fit for your tracking needs.
Standard LF Series
Model
Output Power
Battery Life
Best For
Notes
Low
Medium
High
Very High
High to Very High
Low to Moderate
Low to High
Longest
Balanced
Shorter
Moderate
Varies
Optimized
Extended
Long Duration Tracking
General Purpose
Increased Signal Strength
Higher Durability
Longevity
Extended runtime
Versatility
Stronger Field Recovery
Maximum Output
Smaller Applications
Larger Battery and Higher Output
Specialized Series
Model
Output Power
Battery Life
Best For
Notes
Durability and Range
Ultra-lightweight
Reinforced Build
Still unsure which transmitter is right? Contact us for guidance.
Standard LF Series
Compact, lightweight and built for dependable recovery.
The LF-1 2G is the smallest transmitter in our LF-Series Second Generation lineup. At only 4 grams, it provides the durability and dependable tracking performance of the LF Series in a lighter package for applications where size and weight matter.
Its simple, proven VHF design is built around what a tracking transmitter needs to do: operate reliably, provide long battery life and help you recover your bird when it matters.
Weight: 4 grams
Battery Life: Approximately 21 days / over 500 hours of continuous operation
Range: Up to 3 miles*
Battery: One 392 / SR41W high-drain silver oxide battery
Mounting Options: Leather Bewit or Tail Mount
The LF-1 uses a replaceable battery and is designed for straightforward field use and servicing.
*Actual tracking range varies with terrain, elevation, receiver, antenna orientation and surrounding conditions.
The LF Series is our core transmitter line, balancing output power and battery life for a wide range of field applications.
The LF-2 2G combines long battery life, compact size, and proven VHF tracking performance in a simple, dependable transmitter built for recovery.
Using two 392 (SR41W) silver oxide batteries, the LF-2 provides approximately 14 days of continuous operation while maintaining excellent signal output. Its compact design makes it well suited to falconry applications where size and weight matter, without sacrificing the dependable performance expected from the LF Series.
The current 2G design uses crystal-less electronics and is built to withstand the vibration and impact encountered in the field.
Specifications
Weight: 4.6 grams
Battery: 2 × 392 (SR41W) silver oxide batteries
Battery Life: Approximately 14 days / 330+ hours continuous operation
Maximum Rated Range: Up to 7 miles under favorable conditions
Construction: Rated to withstand up to 50,000 Gs of vibration and impact
Mounting Options: Transmitter only, leather bewit, or tail-mount wire clip
Frequency: Select an available frequency or request a custom frequency
The LF-3 2G is the high-output version of the LF-2, designed for falconers who prioritize maximum signal strength and tracking range.
The LF-3 uses the same compact, lightweight design as the LF-2, but operates at higher output power. The result is greater rated tracking range, with approximately half the continuous battery life of the LF-2.
Powered by two 392 (SR41W) silver oxide batteries, the LF-3 provides approximately 7 days of continuous operation. Its simple crystal-less 2G electronics are designed for dependable recovery use and built to withstand the vibration and impact encountered in the field.
Specifications
Weight: 4.6 grams
Battery: 2 × 392 (SR41W) silver oxide batteries
Battery Life: Approximately 7 days / 160+ hours continuous operation
Maximum Rated Range: Up to 14 miles under favorable conditions
Construction: Rated to withstand up to 50,000 Gs of vibration and impact
Mounting Options: Transmitter only, leather bewit, or tail-mount wire clip
Frequency: Select an available frequency or request a custom frequency
LF-2 or LF-3?
Choose the LF-2 when longer battery life is the priority. Choose the LF-3 when greater transmitter output and maximum tracking range are more important.
The LF-4 combines high transmitter output, practical battery life, and a compact loaded antenna in a rugged package designed for medium and larger hawks, falcons, and other birds.
Powered by a 1/3N lithium battery (2L76), the LF-4 delivers a strong balance between the high output needed for long-range recovery and enough battery capacity for extended field use. It provides approximately 10 days of normal operation, followed by roughly 3 additional days in low-battery mode, for more than 300 hours of total operating time.
The LF-4 comes standard with our magnetic on/off system, allowing the transmitter to be switched on and off without removing or replacing the battery. This makes pre-flight preparation quick and convenient — the transmitter can be tested and fitted to the bird ahead of time, then activated with a simple wave of the magnet just before the hood is removed.
Unlike our transmitters designed around traditional full-length antennas, the LF-4 is specifically tuned for use with a loaded antenna. Its approximately 6.5-inch loaded antenna provides a much shorter physical antenna while maintaining the tracking performance the LF-4 was designed to deliver.
At 7.5 grams, the LF-4 is not intended to be our smallest transmitter. Instead, it is designed for medium and larger birds where its higher output, larger lithium battery, magnetic operation, and compact loaded antenna offer an excellent combination of features.
Specifications
Weight: Approximately 7.5 grams
Battery: 1 × 1/3N lithium battery (2L76)
Battery Life: Approximately 10 days, plus about 3 additional days in low-battery mode — over 300 hours total
Maximum Rated Range: 30+ miles under favorable conditions
On/Off: Magnetic switching — standard
Antenna: Loaded antenna, approximately 6.5 inches
Mounting Options: Transmitter only, leather bewit, or tail-mount wire clip
Frequency: Select an available frequency or request a custom frequency
XLF Series Transmitters
More durable, higher output transmitters for demanding recovery operations.
The XLF 3V is a rugged, fully sealed falconry transmitter built in a precision machined aluminum housing and designed for dependable long-term field use.
Powered by two 392 silver oxide batteries, the XLF 3V offers a strong balance of output, battery life, and durability in a compact transmitter package. At approximately 6 grams, it provides about 7 days / 168 hours of continuous operation and a rated tracking range of up to 20 miles under favorable conditions.
Unlike many simpler transmitters, the XLF Series is built as a fully sealed unit, helping protect the internal electronics from weather, dirt, and hard use in the field.
The XLF 3V also offers a high degree of customization. Most of the features we offer for this series are optional, allowing the transmitter to be configured to suit the customer’s preferred mounting method and operating needs.
All XLF transmitters use replaceable screw-type antennas mounted on standard screw studs, allowing antennas to be changed quickly and easily. Loaded antennas can also be used with XLF models, providing a much shorter antenna length of approximately 6.5 inches while maintaining similar practical performance to the full-length version.
The 3V model is physically identical to the 4.5V model, with the primary difference being battery configuration and operating characteristics.
Specifications
Weight: Approximately 6 grams
Battery: 2 × 392 silver oxide batteries
Battery Life: Approximately 7 days / 168 hours continuous operation
Maximum Rated Range: Up to 20 miles under favorable conditions
Construction: Fully sealed machined aluminum housing
Antenna: Replaceable screw-in antenna on standard screw stud
Loaded Antenna Option: Approximately 6.5 inches long
Customization: Most XLF features available as options
Frequency: Select an available frequency or request a custom frequency
The XLF 4.5V delivers higher output than the 3V model while retaining the same rugged, fully sealed machined aluminum construction and customizable XLF platform.
Powered by three 396 (SR726W) silver oxide batteries, the XLF 4.5V provides a strong combination of transmitter output, compact size, and dependable field performance. At approximately 6 grams, it offers about 6 days / 144 hours of continuous operation and a rated tracking range of up to 25 miles under favorable conditions.
The transmitter is housed in a fully sealed machined aluminum case, helping protect the internal electronics from moisture, weather, and hard use in the field.
Like the rest of the XLF Series, the 4.5V model is highly customizable, with most available XLF features offered as options so the transmitter can be configured around the customer’s preferred mounting and operating setup.
All XLF transmitters use replaceable screw-type antennas mounted on standard screw studs, allowing antennas to be changed quickly and easily. Loaded antennas are also compatible, providing an approximately 6.5-inch antenna while maintaining similar practical tracking performance to the corresponding full-length version.
Specifications
Weight: Approximately 6 grams
Battery: 3 × 396 (SR726W) silver oxide batteries
Battery Life: Approximately 6 days / 144 hours continuous operation
Maximum Rated Range: Up to 25 miles under favorable conditions
Construction: Fully sealed machined aluminum housing
Antenna: Replaceable screw-in antenna on standard screw stud
Loaded Antenna Option: Approximately 6.5 inches
Customization: Most XLF features available as options
Frequency: Select an available frequency or request a custom frequency
XLF 3V or 4.5V? Choose the 3V when slightly longer battery life is the priority. Choose the 4.5V when greater transmitter output and tracking range are more important.
The XLF 6V is the highest-output transmitter in the XLF Series, designed for falconers who want maximum signal strength and tracking range from the rugged, fully sealed XLF platform.
Powered by four 392 silver oxide batteries to operate at 6 volts, the XLF 6V pushes transmitter output higher than the 3V and 4.5V models. The tradeoff is shorter battery life, making this model best suited to users who prioritize maximum output and recovery range over extended runtime.
The transmitter is housed in a fully sealed machined aluminum case, providing excellent protection for the internal electronics against moisture, weather, and hard field use.
Like the other XLF models, the 6V is highly customizable, with most available XLF features offered as options so the transmitter can be configured to suit the customer’s mounting and operating preferences.
All XLF transmitters use replaceable screw-type antennas mounted on standard screw studs for quick replacement. Loaded antennas are also compatible, providing a much shorter antenna length of approximately 6.5 inches while retaining similar practical performance to the corresponding full-length antenna.
Specifications
Weight: Approximately 7 grams
Battery: 4 × 392 silver oxide (SR41W) batteries
Battery Life: Approximately 5 days / 120 hours continuous operation
Maximum Rated Range: Up to 30 miles under favorable conditions
Construction: Fully sealed machined aluminum housing
Antenna: Replaceable screw-in antenna on standard screw stud
Loaded Antenna Option: Approximately 6.5 inches
Customization: Most XLF features available as options
Frequency: Select an available frequency or request a custom frequency
Choosing an XLF model? The 3V offers the longest battery life, the 4.5V increases output and range, and the 6V is the maximum-output option for users who prioritize signal strength and tracking range.
Miniature / Special Series
Ultra-light transmitters designed for small falcons and lightweight tracking setups.
The LF-1 2G Special is our smallest and lightest transmitter, designed for falconers who need the least possible size and weight for very small birds.
Weighing approximately 1.7 grams with battery, the LF-1 Special is an excellent choice for Kestrels, Merlins, and other similarly sized hawks where minimal weight is critical.
To reduce weight as much as possible, the LF-1 Special uses a permanently fixed antenna. If ordered with the Tail-Mount option, the tail mount is also fixed to the transmitter and adds only about 0.2 grams.
The transmitter is powered by one 392 (SR41W) high-drain silver oxide battery and provides approximately 10 days / 240 hours of continuous operation.
Specifications
Weight: Approximately 1.7 grams (with battery)
Battery: 1 × 361 silver oxide battery
Battery Life: Approximately 10 days / 240 hours continuous operation
Maximum Rated Range: Up to 3 miles under favorable conditions
Antenna: Permanently fixed to reduce weight
Mounting Options: Transmitter only, leather bewit, or fixed tail mount
Frequency: Select an available frequency or request a custom frequency
Best suited for: Kestrels, Merlins, and other very small hawks
I would remove every reference to 392 / SR41W from the LF-1 Special page.
The LF-2 2G Special combines long battery life and dependable tracking performance in an exceptionally small, lightweight package.
Weighing approximately 2.2 grams, the LF-2 Special is designed for smaller raptors where transmitter size and weight matter, while still providing approximately 14 days of continuous operation and a rated tracking range of up to 7 miles under favorable conditions.
Like the other LF Special transmitters, the LF-2 Special uses a permanently fixed antenna to minimize weight. Its electronics are hand-potted for durability and protection against the vibration and impact encountered in the field.
If ordered with the Tail-Mount option, the mount is permanently fixed to the transmitter and adds approximately 0.2 grams.
Specifications
Weight: Approximately 2.2 grams
Battery: 2 × 361 (SR721W) silver oxide batteries
Battery Life: Approximately 14 days / 330 hours continuous operation
Maximum Rated Range: Up to 7 miles under favorable conditions
Antenna: Permanently fixed to minimize weight
Mounting Options: Transmitter only, leather bewit, or fixed tail mount
Frequency: Select an available frequency or request a custom frequency
The LF-3 2G Special delivers higher-output tracking performance in the same exceptionally small, lightweight package as the LF-2 Special.
Weighing approximately 2.2 grams, the LF-3 Special is designed for falconers who want greater signal strength and maximum tracking range while keeping transmitter size and weight to an absolute minimum.
The LF-3 Special uses the same compact physical design as the LF-2 Special, but operates at higher output power. The result is a rated tracking range of up to 14 miles under favorable conditions, with approximately 7 days of continuous battery life.
Like the rest of the LF Special Series, the transmitter uses a permanently fixed antenna to minimize weight. Its electronics are hand-potted for durability and protection against vibration and impact in the field.
If ordered with the Tail-Mount option, the mount is permanently fixed to the transmitter and adds approximately 0.2 grams.
Specifications
Weight: Approximately 2.2 grams
Battery: 2 × 361 (SR721W) silver oxide batteries
Battery Life: Approximately 7 days / 168 hours continuous operation
Maximum Rated Range: Up to 14 miles under favorable conditions
Antenna: Permanently fixed to minimize weight
Mounting Options: Transmitter only, leather bewit, or fixed tail mount
Frequency: Select an available frequency or request a custom frequency
Extended Battery Life
LF series transmitters with larger batteries for extended operating life without sacrificing power.
Hack transmitters are long-life, high-durability units that are ideal for use on a young bird that is being hacked. The long life helps to ensure that you have enough time to find your bird. These are also ideal backup transmitters.
Weight: 7 grams
Battery Life: 55 days (~1300 hours) continuous operation
Range: 7 miles
Hack transmitters are long-life, high-durability units that allow you enough time to find your young bird in training. Similar to the LF-2 Hack, this LF-3 Hack gives you a little more range and slightly less battery life.
Weight: 7 grams
Battery Life: 37 days (~880 hours) continuous operation
Range: 10 miles
Alternative Tracking
These units go a step beyond traditional tracking devices by adding sound and/or light.
The Beeper Bell from LL Electronics is the perfect entry level locating device for apprentices and also the perfect supplemental device for experienced falconers. Using sound to help locate a hidden hawk from over 500 feet (150 Meters) away regardless of motion, soft ground cover or downed prey that would cause a conventional bell to fall silent. The standard Beeper Bell will run on two 392 batteries for about 1 week. For a little extra volume, the Beeper bell will also run on three 396 batteries to attain 4.5 volts of power for about 5 days.
Magnetic wand and Batteries sold separately.
The Flash Beeper Bell from LL Electronics is the perfect entry level locating device for apprentices and also the perfect supplemental device for experienced falconers. Using sound to help locate a hidden hawk from over 500 feet (150 Meters) away regardless of motion, soft ground cover or downed prey that would cause a conventional bell to fall silent. When the hunt lasts longer than expected the Flash Beeper Bell is great for assisting in finding a hawk in low light or no light situations. The Flash Beeper Bell with last for about 3 days on two 392 batteries. If you want a little more brightness or volume the bell will run on three 396 batteries to attain 4.5 volts for about 2 days.
Magnetic wand and Batteries sold separately.
The LF-4 transmitter is one of our most popular options for its high output power. The LF4 LED adds LEDs in a translucent body that illuminates brightly every time the transmitter pulses, creating a highly visible beacon of light that can be spotted in low light conditions. This transmitter features low battery warning, magnetic on/off and a short 6.5 inch (16.5 cm) antenna without sacrificing performance.
Weight: 7.5 grams
Battery Life: 4 days (~100 hours) continuous operation
Range: 30+ miles