Garmin T20 Track only product video (Contains information about the TT25 track and Train collar also) 

Garmin T20 Tracking Collar

Track your pack with the Alpha® T20 dog collar. This durable yet slim collar is designed to accommodate various breeds and includes a replaceable flex band. When used with a Garmin Alpha Handheld (sold separately), you can track your dog from several miles away.

New Feature: Garmin T20 Dynamic Update Rate
This update rate option dynamically adjusts based on your dog's speed and movement, conserving battery life. The GPS collar uses power more efficiently, enabling longer battery life on a single charge. If hunters prefer the standard update rates, they can still select 2.5, 5, 10, 30, or 2-minute intervals.

New Feature: Garmin T20 Multi-Colored Beacon Lights
Our new multicolor LED lights make it easy to track dogs in the dark. The T20 lets you switch between Red, Green, Blue, Yellow, Cyan, Magenta, and White, maximizing visibility or differentiating dogs for easy tracking at night.

New Feature: Garmin T20 Beacon Light Location
Relocated to the GPS trackingn collar's corner, the beacon lights improve dog safety during road crossings or wilderness navigation. Corner placement increases visibility to drivers and makes tracking from various angles easier.

New Feature: Garmin T20 Long Battery Life
The Garmin T20 boasts an impressive 68-hour battery life with dynamic tracking, outperforming the Garmin TT15 Mini. Upgrade to the optional extended life battery (sold separately) for up to 138 hours of dynamic tracking, matching the TT15X battery life.

New Feature: T20 Wi-Fi Compatible Collars
Update the Garmin T20 collars with Wi-Fi for seamless software updates while charging. The GPS tracking collar will automatically update software via Wi-Fi after being connected to the charger for 25 minutes.

New Feature: T20 Replaceable GPS Parts
Easily replace the GPS antenna on the T20 tracking collar by removing and replacing two Philips screws. Users can switch between different size antennas for small or large dogs or opt for a more rugged version for added durability.

Small Changes on the Garmin T20:
An enlarged gap where the collar slides through makes strap replacement easier. The battery housing features rounded edges like the Mini GPS tracking Collars, ensuring comfort for dogs with short legs.

Optional Extended Life Battery Replacement:
Replacing batteries, including the optional extended life ones, is hassle-free with the updated design. Just undo six screws and use alignment guides to help with the connector.

The T20 maintains the same features as the T5X and T5 Mini GPS tracking collars, such as GPS/GLONASS tracking, long-range tracking, waterproof design, replaceable collar straps, compatibility with various Garmin handhelds, rescue mode, and collar sleep mode.