Compact and lightweight, the Sport PRO is so simple, intuitive and easy to use in 1 hand, you don't even have to look at it. It allows you to train up to 3 dogs(additional dog devices required, sold separately). Quick turn dial gives positive clicks when changing between 10 stimulation levels and controlling auxiliary functions. Includes built-in Bark Limiter with settable levels. Four buttons control continuous and momentary stimulation, vibration, tone and lights. Range ¾-mile. Rechargeable, user-replaceable battery. Dog device and collar features interchangeable, replaceable long and short contact points. The handheld even floats.