Aetertek At-919-2 1000m Remote Range Dog Shock Collar 2 Dog Training Rechargeable Dog Bark Collar Waterproof Shock Collar, Professional Bark Collar with LCD Displayer 100% submersible (waterproof) receiver, receiver can be immersed in water when swim As 1-1 or 1-2 dog trainer (This list is for 2 dog training system), you can control your dogs individually or at the same time Provide a professionale and Adjustable Shock, Vibration, Beep, Auto no bark, LCD, Flashlight Remote range up to 1095 yard (approx.1000 meter), for all dog size from 15-150lbs, especially medium to large and stubborn dogs Convenience of easy-to-read LCD screen shows the stimulation level and dog selection.