Aetertek At-216D-2 Dog Trainer Submersible 100% Waterproof Shock Collar 550m Remote Control Collar for 2 Dog Training Anti Bark Shock Collar Rechargeable Dog Training System Popular dog shock collar 100% waterproof, can be used in water when swim Multi-function: sleep mode for long battery life, strong vibration, beep, 0-7 adjustable level of shock Rechargeable dog collar receiver, environmental-friendly use Remote control dog trainer to 600yards (approx. 550 meters) and signal can pass through walls and fences, suitable for all dog size from 15-150lbs CE,ROHS,FCC,RTTE Approved.1 Year manufacturer warranty