Aetertek AT-218 Submersible Remote 550M 1 Dog Training Trainer Pet Shock Control Collar With Auto Anti Bark Feature New arrival!! updated dog shock collar provide professional and safe correction mode: Strong Vibrate, 0-9 level of Shock, Beep, Auto anti bark As 1 or 2 dog training shock collar, this list is for 1 dogs training system, you can upgrade it by adding extra receiver to control your dogs separately or at the same time Submersible (100% waterproof) dog trainer, can be immersed in water when swim Remote control to 600yards (approx. 550 meters) for all dog size from 15-150lbs, especially for medium to large dog Rechargeable & Water-proof dog collar with anti bark feature, you can control you dog manually or automatically