Garmin Alpha T 20 Dog Collar LED. The rugged yet slim housing is designed to fit a range of breeds and features a user-replaceable flex band. When used with a compatible handheld (sold separately) this collar can track up to 9 miles. Plus it includes a built-in multicolor LED that makes identifying your dog easy even in darkness. Get up to 68 hours of battery life with the standard battery pack or upgrade to the expanded battery pack to get up to 136 hours when using dynamic tracking which optimizes update rates based on how your dog is moving. And when charging and connected to your network with Wi-Fi technology the collar will automatically install the latest software updates. Specifications for Garmin Alpha T 20 Dog Collar: Manufacturer: Garmin Collar Type: Stim Collar Fastener/Closure Type: Buckle Color: Blue Size: 1 ft Condition: New Fabric/Material: Plastic Coated Nylon Biothane Weight: 13.6 oz Features of Garmin Alpha T 20 Dog Collar Track your dog at a range of up to 9 miles with updates as frequent as 2.5 seconds when used with a compatible handheld (sold separately) Rugged yet slim design is universally sized to fit large and small breeds User-replaceable flex band Get extended battery life with dynamic tracking based on your dogs movement Identify your dog even in the dark with a large easy-to-see multicolor LED; colors include yellow magenta cyan white green red or blue Get automatic updates when the Alpha T 20 dog collar is charging and connected to your network with Wi-Fi technology Pairs with Garmin dog tracking handhelds such as Alpha and Pro 550 Plus (sold separately) Batteries are user-replaceable and easy to change; when using dynamic tracking a standard pack lasts up to 68 hours and an upgraded expanded battery pack lasts up to 136 hours Wi-Fi is a registered trademark of the Wi-Fi Alliance. Package Contents: Garmin Alpha T 20 Dog Collar Rechargeable Li-ion battery pack 1in blue collar strap Charging clip USB-C cable Documentation Garmin 010-02447-00: Alpha T 20 Dog Collar LED