The BTB Series give you the ability to keep track of your dog’s location when he is out of sight and lets you know when he has gone on point. The use of both the sound booster element and the long duration, double beep make the BTB 800 and BTB 809 collars much easier to hear at long range. (Actual yardage will vary depending upon the relative position of yourself and your dog and other variables such as cover and wind speed and direction). Easy Operation - One touch push button system Long Range Audibility - Audio booster element Reliability - State-of-the-art microcomputer technology Two Operating Modes - Run/Point, or Point only Rechargeable Batteries - Charger included Completely Waterproof