The Garmin Beeper Battery Pack (010-03383-00) adds both audible tracking and extended power to your Alpha® T 20 or Alpha TT 25 dog collar, helping you stay aware of your dog's location and movement in the field. Featuring a powerful built-in speaker, this beeper delivers clear, configurable sounds that indicate key behaviors such as running or going “on point,” so you can focus on the hunt without constantly checking your handheld. Designed for seamless integration, the beeper battery pack attaches easily to compatible collars and is fully controllable from your Alpha® 10/200/300 series or PRO 550 Plus handheld (sold separately). With up to 78 hours of battery life in dynamic tracking mode and integrated LED beacon lights for low-light visibility, it provides reliable performance and peace of mind during long days outdoors. Compatible with Alpha® T 20 and Alpha TT 25 dog collar devices Powerful built-in speaker with 5 selectable sounds: single, double, triple, low beep, and hawk Three volume levels: low, medium, and high Two operating modes: run, point, plus manual locate activation Manually activate sound in locate mode to quickly find your dog Up to 78 hours of battery life in dynamic tracking mode Integrated LED beacon lights for enhanced visibility in low-light conditions Dimensions: 80.5 x 69.1 x 38.6 mm; Weight: 125.6 g Garmin Beeper Battery Pack 010-03383-00 in Black