DESC: Sport Dog Sport Dog's line of electronic training products are refreshingly easy to use, and not overdesigned. More range. More features. More durability. Sound too good to be true? It's not, and Sport Dog backs up these promises with its lifetime limited warranty. Features 1/2-mile range, a waterproof and submersible transmitter and receiver, up to 16 levels of continuous stimulation, 8 levels of momentary (nick) stimulation, and a tone button. Transmitter has 7 selectable modes of operation and expands to 3 dogs; includes replaceable rechargeable batteries.