Aetertek Dog Pet Barking Electronic Shock Training Collar Remote Control Wireless E-collar Rechargeable and Waterproof Use electromagnetic induction switch solution,on the power ON/OFF switch to ensure unlimited accurate switch, more convenient and reliable. 4 functions:9 levels of shock +vibration+beep+auto anti bark feature Waterproof and rechargeable collars Electric remote range up to 550M. Support to train two dogs at the same time or separately. Excellent on pre-sale and after-sale service, one year unconditional quality warranty. All of our effort are for pets and our users.