Description The Garmin Alpha T20 is a slim, rugged, universally sized GPS dog collar engineered to perform with any breed in any terrain. A top-mounted, high-sensitivity GPS + Galileo receiver delivers fast, accurate positioning and sends location updates via VHF up to 9 miles away, with tracking rates as quick as every 2.5 seconds when paired with a compatible Garmin handheld (sold separately). Featuring dynamic tracking, the collar automatically adjusts update rates based on your dog&';s movement, extending battery life up to 68 hours with the standard pack or 136 hours with the extended pack. Bright, multi-color LED beacon lights make it easier to see and identify dogs in low-light conditions, and they can be remotely controlled from a compatible handheld. A user-replaceable flex band withstands hard hunting and harsh conditions, while built-in Wi-FiA(R) enables automatic software updates whenever the collar is charging. The Alpha T20 was purpose-built to help you track smarter, run dogs confidently, and hunt safer. Specs Dimensions 3.2" x 1.8" x 1.4" Weight Transmitter and antenna (without collar) - 5.9 ozTotal (with collar) - 8.4 oz Water Rating 1 ATM (10 meters) Battery Type Rechargeable lithium-ion pack; user replacable Battery Life - Up to 68 hours using dynamic update rate (default mode)- Up to 25 hours with 2.5 second update rate- Up to 84 hours with 2 minute update rate Tracking/Training Range Up to 9 miles Compatible Devices Alpha 300, Alpha 300i, Pro 550 Plus Manufacturer Warranty Limited lifetime against manufacturer defects