Garmin Alpha T 20 GPS Dog Tracking Collar
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Tracking Without the Training Functions
If you want the Garmin Alpha tracking system without training functions, the T 20 is the tracking-only collar in the range. Its top-mounted high-sensitivity GPS and Galileo receiver determines the collar's position, then sends that location by VHF to a compatible handheld up to 14.5 km away. Location updates can be as frequent as every 2.5 seconds with compatible settings.
Sized for Different Dogs and Longer Tracking
The slim universal-size design is made to work across large and small breeds. With the standard 2.54 cm collar strap, Garmin specifies a minimum neck circumference of 24 cm, or 16.5 cm with the strap fitted in the flipped configuration. The flex band and rechargeable lithium-ion battery are user-replaceable, so those components can be changed without replacing the complete collar device.
Where available, Garmin's dynamic update rate changes the tracking update rate according to your dog's activity to help conserve battery power. The standard battery is rated for up to 68 hours using dynamic tracking, with an optional extended battery increasing that to up to 136 hours. The device also carries a 1 ATM water rating, which means it can withstand pressure equivalent to a depth of 10 m.
Easier to Identify and Keep Updated
Multicolour LED beacon lights can be remotely activated and changed from a compatible handheld, giving you another way to identify the collar in low-light conditions. When the T 20 is charging and connected to a Wi-Fi network, it can also receive automatic software updates without needing a manual update each time.
Key Features
- Tracking-only Alpha collar: Designed for dog location tracking without the training functions found on Garmin Alpha TT collars.
- Up to 14.5 km tracking range: Sends the dog's location to a compatible Garmin handheld over VHF, with updates available as frequently as every 2.5 seconds.
- Dynamic update rate: Can vary the update rate according to the dog's activity to help conserve battery power; Garmin notes that this feature is not available in all areas.
- Universal sizing: The slim collar format is designed for both large and small dog breeds, with additional adjustment available by changing the strap configuration.
- Multicolour LED beacons: Remotely controlled beacon lights help identify and locate the collar in low-light conditions.
- Replaceable battery and flex band: Both components can be replaced rather than replacing the whole complete collar device.
- 1 ATM water rating: Garmin rates the device to withstand pressure equivalent to a depth of 10 m.
Specifications
| Specification | Detail |
| Brand | Garmin |
| Model | Alpha T 20 |
| Product Type | GPS dog tracking collar |
| Manufacturer Part Number | 010-02447-03 (Garmin) |
| Primary Function | Dog tracking only; no training functions (Garmin) |
| Tracking Range | Up to 14.5 km (9 mi) (Garmin) |
| Location Update Rate | As frequent as every 2.5 seconds (Hamills Taupo) |
| Satellite Systems | GPS and Galileo |
| Receiver | High-sensitivity receiver |
| GPS Antenna | Top-mounted |
| Frequency Mode | VHF |
| ANT Wireless Range | Up to 10 m (Garmin) |
| Dimensions | 8.1 x 4.5 x 3.5 cm |
| Weight Without Collar | 168.5 g |
| Total Weight With Collar | 239.5 g (Hamills Taupo) |
| Battery Type | Rechargeable, user-replaceable lithium-ion |
| Standard Battery Life - Dynamic Tracking | Up to 68 hours |
| Standard Battery Life - 2.5 Second Updates | Up to 25 hours |
| Standard Battery Life - 2 Minute Updates | Up to 84 hours |
| Extended Battery Life - Dynamic Tracking | Up to 136 hours; extended battery sold separately |
| Extended Battery Life - 2.5 Second Updates | Up to 50 hours; extended battery sold separately |
| Extended Battery Life - 2 Minute Updates | Up to 168 hours; extended battery sold separately (Hamills Taupo) |
| Dynamic Update Rate | Yes; availability varies by area (Garmin) |
| Operating Temperature | -20 to 60 degrees C |
| Charging Temperature | 0 to 40 degrees C |
| Storage Temperature | -20 to 70 degrees C (Garmin) |
| Interface | USB-C |
| Water Rating | 1 ATM; pressure equivalent to 10 m depth (Garmin) |
| Minimum Neck Circumference - Standard Strap | 24 cm |
| Minimum Neck Circumference - Flipped Strap | 16.5 cm |
| Collar Strap Compatibility | Up to 2.54 cm (1 inch) wide (Hamills Taupo) |
| LED Beacon Lights | Yes, multicolour |
| Flex Band | User-replaceable |
| Replaceable Collar Straps | Yes |
| Sleep Mode | Yes, with compatible Alpha products |
| Rescue Mode | Yes |
| Automatic Software Updates | Wi-Fi when charging and connected to a network (Hamills Taupo) |
Items Included
- 1 x Garmin Alpha T 20 dog collar device with rechargeable lithium-ion battery
- 1 x 2.54 cm collar strap
- 1 x Charging clip
- 1 x USB cable
- 1 x Documentation pack
Compatibility
- Garmin Alpha XL
- Garmin Alpha 300 and Alpha 300i
- Garmin Alpha 200 Plus
- Garmin Alpha 200 and Alpha 200i
- Garmin Alpha 10
- Garmin Alpha 100
- Garmin Pro 550 Plus
- Garmin Astro 430
Compatible handheld is sold separately.







