Focus on the hunt, not your equipment, with TT™ 15X, the dog tracking and training collar with up to 80 hours of battery life. With sleep mode, remotely put your device to sleep to extend battery life even further. Compatible with all existing Alpha®, PRO 550 Plus and Astro® 430 handheld devices from Garmin. This high-sensitivity GPS and GLONASS receiver provides 18 levels of continuous and momentary stimulation plus audible tone and vibration modes. LED beacon lights, activated from your compatible handheld, help keep track of your dog in the field. Easily update your device via Garmin Express™ software, available for both Mac® and Windows® devices.