Aetertek At-216s Classic Dog Bark Collar for 1 Dog Trainer 100% Waterproof (Submersible Dog Shock Collar) 550m Remote Control 1 Dog Training Anti Bark Shock Collar, Dog Training Shock Collar with 0-7 Adjustable Shock Level Can be used as 1 dog, 2-dog or 3-dog remote dog training shock collars system (This list is for 1 dog with only 1 receiver). 216D doesn't have auto anti bark feature. Popular dog training collar with strong Vibration, 0-7 adjustable levels of Shock and Beep. Provide professional and safe correction mode Rechargeable 100% waterproof collar receiver, your dog can wear this trainer when swim Remote control dog trainer with range up to 600yards (approx. 550 meters) and signal can pass through obstacles, such as walls and fences Adjustable strap fits 6-25"/15cm-65cm neck size, suitable for all dog size from 15-150lbs