The Humane Contain HC-8001 electronic fence kit with waterproof collar is ideal to train your pet. This Humane Contain electronic fence kit is loaded with a rechargeable transmitter back-up battery and collar batteries to last you six months. Furthermore, it is armed with 100 feet of extra, pre-twisted wire, giving you and your pet the freedom to move. This Humane Contain HC-8001 electronic fence kit with waterproof collar features the Pulsed Proportional Stimulus System. This stimulates shock in small bursts. The rapidity increases as your dog approaches the boundary. What’s more, this Humane Contain electronic fence kit delivers sounds to your dog, to support shock stimulus.