Up to 80 hours of battery life! With a compatible tracking and training handheld, use sleep mode to remotely put your device to sleep and 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 features 18 levels of continuous and momentary stimulation plus audible tone and vibration when used with your compatible tracking and training handheld. 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.