Track and train your pack with the Alpha TT 25 dog collar. The rugged yet slim housing is designed to fit a range of breeds and features a user-replaceable flex band. When used with a compatible handheld (sold separately), you can track and send training commands up to 9 miles. A built-in multicolor LED makes identifying your dog easy, even in darkness. It also can be used to train your dog. The collar features 18 levels of momentary and continuous stimulation as well as tone and vibration for training. Get up to 68 hours of battery with the standard battery pack, or upgrade to the expanded battery pack to get up to 136 hours with dynamic tracking which optimizes update rates based on how your dog is moving. Plus, when charging and connected to your network with Wi-Fi technology, the collar will automatically install the latest software updates