Aetertek AT-216D 600 Yard Remote Dog Collar Add-on Electric Waterproof Training Collar Aetertek 216D dog shock collar Add-on Receiver replacement Remote range 550M 100% waterproof and submersible. with it, dog can even to showering, swimming and diving Shock Vibration Beep correction method The dog training collar works from up to 600 yards away! used electromagnetic induction switching method which makes it is easier to turn on/off and more durable; The dog collar is made out of high quality comfortable TPU and it is adjustable to fit breeds of nearly all sizes for small dogs and large dogs. TPU collar is durable and free to cut. package included: 1 receiver 1 collar