Patpet Dog Training Collar IPX7 Waterproof, Fast rechargeable Shock Collar for Dogs with 1600FT Long Remote Range, 3 Modes Beep Vibration Shock e Collar for Small Medium Large Dog(AC Adapter Included) dog shock collar EMITS A HISSING SOUND through EMITS A HISSING SOUND through a quick burst of compressed air that mimics the warning hiss of a snake or cat to distract the dog PREMIUM DOG TRAINING COLLAR convert your dog's behavior within days or get your Money Back 【Incomparable Blind Operation for Easy operation& Mute Button Design for Professional Training】The recognizable button design allows distinguish each button by touching easily Vibration Mode (1 8 level) and Shock Mode (1 16 level)