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USED Garmin T20 Add-On GPS TRACKING ONLY Collar | Gun Dog Supply

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USED Garmin T20 Add-On GPS TRACKING ONLY Collar for ALPHA / PRO 550+

  • 60-day Gun Dog Supply warranty
  • Hand-tested to meet all original specs
  • Supplies are limited!


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    Read 5 Reviews
    List: $299.99
    Order Yours: $249

    Strap Color: 
    Add Optional Charger: 






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    Usually ships the next business day.

    Code: T20USD
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    Alpha T20 Collar DetailAlpha T20 Collar Connector DetailAlpha T20 Collar Bottom DetailAlpha T20 Collar Inside DetailAlpha T20 Collar Side DetailAlpha T20 Collar on ChargerAlpha T20 Tracking Lights







    What is a "USED" product?

    These used Garmin collars and handhelds come from customer trade-ins of previously owned equipment. Each unit is personally inspected by Steve, who verifies that it meets our standards. We clean up the gear, update the firmware, do a full factory reset, and test everything to make sure it's working like it should. All used collars and handhelds from Gun Dog Supply come with a 60-Day Limited Warranty -- if it stops working due to normal use within 60 days, we'll repair it or replace it.

  • Personally inspected and tested by Steve
  • Reset to original factory settings
  • Updated to the latest firmware
  • 60-day Gun Dog Supply warranty




    Garmin T20 Features:
    • Dynamic Tracking auto-adjusts the collar update rate based on your dog's activity (less movement=lower update rate) to extend the battery life to approx. 68 hours on a single charge
    • Multi-colored remotely activated LED light beacons let you easily ID your dogs in low light conditions with 7 color options: white, yellow, magenta, cyan, green, red, and blue
    • User-replaceable flex band reduces downtime if your collar gets damaged
    • Multi-colored collar status indicator
      • Blue: pairing mode
      • Yellow: acquiring GPS signal
      • Green: GPS signal established
      • Red: low battery
    • WiFi connectivity allows collar software to auto-update while charging
    • "One-size-fits-most" collar design can be comfortably worn by both small and large dogs
    • Remotely activated Sleep Mode further extends battery life (only with Alpha handhelds)
    • Waterproof (1 ATM -- 10 meters)
    • Top-mounted, high-sensitivity GPS / Galileo receiver gives better signal reception than GPS alone
    • VIRB control on the collar lets you start or stop VIRB video recording with the Alpha handheld (VIRB camera not included)
    • User-replaceable 1" collar strap fits neck sizes between 11.5" and 22"
    • Braided steel collar antenna takes all the abuse a hunting dog can give it
    • USB-C port on collar for manual software updates via Garmin Express and exporting additional GPS dog data


    • Garmin T20 Collar Specifications:
    • Dimensions: 1.4" H x 3.2" W x 1.8" D
    • Weight: 8.8 oz. with collar strap and antenna


    Garmin T20 Standard Battery Life (included):
    • Up to 68 hours using dynamic tracking (default)
    • Up to 25 hours with location updates every 2.5 seconds
    • Up to 84 hours with location updates every 2 minutes


    Garmin T20 Extended Battery Life (available separately):
    • Up to 136 hours using dynamic tracking (default)
    • Up to 50 hours with location updates every 2.5 seconds
    • Up to 168 hours with location updates every 2 minutes



    AKC Competition Approved

    The AKC Performance Events Department has approved the Garmin T20 collar for use in pointing breed field trials and hunting tests.



    Not available to Canadian addresses. This product is approved for use in the US only. Collar-to-handheld radio communication may be disabled in Europe and other prohibited areas.



    How to Match Collars to Your Alpha

    Please read all steps before starting.

    To pair wirelessly, the dog collar device must be within range of the Alpha handheld.


    1. Hold the power button on the dog collar device until the device emits two series of beeps (about 2 seconds), and then release the power button. The status LED flashes blue. The dog collar device is now ready to be paired with a handheld.


    2. On the handheld, select Dog List > Add Dog.


    3. Select Pair Collar, and follow the on-screen instructions.


    4. After successfully adding the dog collar device, enter the name of the dog, and select check mark.


    5. Select a beacon color for this dog collar device, and select finish.








    How to Pair Additional Garmin Collars to Your PRO 550 PLUS

    Please read all steps before starting.


    1. Charge the new receiver for two hours and install the desired color collar strap.


    2. Turn on the handheld device.


    3. Select a color with the toggle switch. The dog collar device will be assigned to this color.


    4. Turn the intensity dial to N.


    5. Press the green tone button.


    6. Press the top training button.


    7. Follow the on-screen instructions to select pair collar.



    8. Follow the on-screen instructions to select auto, tree, or point for the type of dog wearing the collar.


    9. The handheld device is now ready to pair. You can cancel pairing by pressing the green tone button.


    10. If the dog collar device is on, turn it off.


    11. Hold the power button on the dog collar device until the device emits two series of beeps (about 2 seconds), and then release the power button. The status LED flashes blue. The dog collar device is now ready to be paired with a handheld.


    12. The handheld device will vibrate and a check mark will appear on the screen when the devices have paired successfully.

    NOTE: GPS signals must be established on both devices before the handheld device displays the dog collar device battery status, distance, and direction.









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    Customer Reviews

     
    Review Summary
    5.0
    5 Reviews
    5
    100% (5)
    4
    0% (0)
    3
    0% (0)
    2
    0% (0)
    1
    0% (0)
    100% Recommend this product (5 of 5 responses)
    By Glenn
    Newville, Alabama
    Great product.
    January 17, 2025
    Easy to setup and use. I had an older model Collar and decided to upgrade to the T20.
    By Steve
    Vermont
    Great collars
    October 30, 2025
    I upgraded from the minis. The T20's seem to connect more quickly and the battery lasts a long time. Great collars and fantastic service from GDS. I traded in my mini's. Great transaction.
    Pros
    • Fast connection.
    • Great battery life.
    Cons
    • None
    By Wes B.
    Yuma, Arizona
    Good product good store
    May 12, 2025
    This is a good product. Gun Dog Supply has a great selection. And it's easy to place order on line. know Garmin upgraded and you can no longer get the older ones. Now I have to get new chargers. It does come with one. Fast shipping and updated emails letting you know when it ships and expected delivery date.
    Pros
    • Good range
    • Compatible with several Garmin handheld units
    Cons
    • Not compatible with older Garmin chargers. Need to order additional ones for truck.
    By Mike
    Michigan
    Good Performance So Far with Occasional Handheld Connection Issues
    November 26, 2024
    I have used the collar a handful of times and performance appears good. That said, time will tell how good. I have had some connection issues with my Alpha 200i which have been resolved by rebooting the collar, the handheld or both and I had one instance where I had to remove and re-add the collar to my 200i to get it to connect. Once the collar is connected, it seems to stay connected to the handheld.Ironically, I hunted with a friend one day who was also having connection difficulties with another Garmin system at the same time as me--but he was using completely different Garmin products. I don't think he ever got it resolved.
    Pros
    • Good, trouble-free tracking.
    Cons
    • Intermittent connection issues with a known working 200i.
    By tim
    MN
    Works Great
    July 13, 2023
    Have been using it with an Alpha 300i for a few weeks and it is working well.
    CA Residents: WARNING: Cancer and Reproductive Harm - P65Warnings.ca.gov.

    USED Garmin T20 Add-on Collar

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