Specifically designed for upland hunting, the Dogtra 2700T&B or 2702T&B E-Collar Electronic Dog Training Collar deliver easy-to-use dog training performance. Giving you control and location assistance for 1 or 2 dogs within a 1-mile range, this high performance training system features a built-in beeper and Accelerometer sensor for increased versatility. Built into the receiver to eliminate bulkiness and the risk of catching on obstacles, the single-body, downward facing beeper horn offers 3 modes (Point-Only, Run/Point, and Locate) to help you track your dog. Combining a High Performance Pager (HPP) vibration system and enhanced contact points with 127 levels of nick or constant stimulation, this collar system puts accurate, effective correction at your fingertips. Waterproof transmitter features an easy-to-use rheostat dial stimulation control and low/high power setting to precisely control the stimulation level you need. Transmitter also offers a LCD screen that displays the exact level of stimulation in use and battery life. Designed to work with dogs as small as 35 lbs., this fully waterproof collar system runs off rechargeable batteries with a 2-hour rapid recharge. 2700T&B system contains 1 collar. 2702T&B system comes with 2 collars. IPX9K waterproof rating. Manufacturer's 2-Year limited lifetime warranty. Easy-to-use upland hunting training system for 1 or 2 dogs Versatile system - offers correction and location assistance Up to 1 mile range 127 levels of nick or constant stimulation 3 beeper modes - Point-Only, Run/Point, and Locate for easier location High Performance Pager (HPP) vibration system Easy-to-use rheostat dial stimulation control Low/high power setting LCD screen - displays the exact level of stimulation in use and battery life Designed for dogs as small as 35 lbs. Rapid charge rechargeable lithium polymer batteries in transmitter and collar Enhanced contact points Fully waterproof