Aetertek AT-919C Super Two Pet Dog Electronic Shock Collar Training System For Sport Large Dogs 1000M Remote Range Waterproof Rechargeable collars Aetertek Super product,can fit for large,serious and stubborn dogs The LCD display shows power status,dog training system,auto anti bark feature and so on 100% waterproof and rechargeable collars Electric remote range up to 1000M. Collar features vibrations, beeps and 10 levels of progressive shock.