Aetertek At-218-2 Auto Anti Bark Collar Submersible Dog Bark Collar (100% Waterproof Dog Collar) 600yards Remote 2 Dog Training Shock Collar, Dog Shock Collar with Flashlight, Rechargeable Dog Training Collar for 2 Dogs Control Submersible (100% waterproof) dog trainer, can be immersed in water when your dog is swimming. You dog will be happy to have it when swim. As 1 or 2 dog training shock collar, this list is for 2 dogs training system, you can control your dogs individually or at the same time Classic dog shock collar provide professional and safe correction mode: Strong Vibrate, 0-9 level of Shock, Beep, Auto anti bark, Flashlight Remote control to 600 yard (approx. 550 meter) for all dog size from 15-150lbs, especially for medium to large dogs with Adjustable strap fits 6-25"/15cm-65cm neck size Bark collar with flashlight, so you can control your dog even in the darkness