3000 FT Dog Training US Collar Rechargeable Remote Shock PET Waterproof TrainereBay 2725 FT Dog Training US Collar Rechargeable Remote Shock PET Waterproof Trainer 1000 Yard Super Far Remote RangeThe remote distance is up to 1000 yards, easily train your dogs in the park or backyard, use this dog training collar to correct dogs' barking, walking, leash training, sitting, aggression, and other behavioral obedience; one remote transmitter can control up to 3 pieces of electronic collar receivers; Train your dogs under your