Garmin TT25 Base Receiver with Extended Battery Pack Black

The top-mounted, high-sensitivity GPS and Galileo receiver keeps track of your dog?s location, and the Alpha TT 25 collar transmits that location via VHF up to 9 miles away with updates as frequent as every 2.5 seconds when used with a compatible handheld (sold separately). Train your dog with 18 levels of continuous or momentary stimulation plus audible tone and vibration (when used with a compatible handheld; sold separately). When using dynamic tracking, get up to 68 hours with the standard battery pack and up to 136 with the extended battery pack (sold separately). The Alpha TT 25 GPS dog collar easily pairs with Garmin dog tracking handhelds, such as the Alpha series and Pro 550 Plus (sold separately). In the box: Alpha TT 25 dog collar (base device), Extended rechargeable Li-ion battery pack, Standard VHF antenna and keeper, Charging clip, Charging/data cable, Metal contact points kit and DocumentationFeatures: A rugged yet slim design is universally sized to fit large and smal