TRACKING 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). TRAINING Train your dog with 18 levels of continuous or momentary stimulation plus audible tone and vibration (when used with a compatible handheld; sold separately). LOCATION BEEPER The integrated location beeper has 5 sound options that can be assigned to various movements, such as running or on-point, and manual triggered with the push of a button when in locate mode with variable volumes giving you another option for keeping tabs on your dog in the field. UNIVERSAL SIZING A rugged yet slim design is universally sized to fit large and small breeds. DYNAMIC TRACKING Get extended battery life with dynamic tracking based on your dog’s movement. RUGGED DESIGN The collar features a user-replaceable flex band that can withstand the toughest outdoor environments. LED BEACON LIGHTS Alpha TT 25 features bright LED beacon lights — in multiple color options — that can be remotely activated from your compatible handheld device to help you track your dog in low-light conditions. REPLACEABLE BATTERY PACKS When using dynamic tracking, get up to 70 hours with the standard battery pack and up to 136 with the extended battery pack (sold separately). AUTOMATIC UPDATES Receive automatic software updates when Alpha TT 25 is charging and connected to your network with Wi-Fi® technology. PAIR WITH HANDHELDS 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).