Control 2 collar receivers via a remote. PATPET shock collars for dogs with remote with 2 receivers, great for you who have 2 dogs. Choose the effective mode and intensity level from the beep, vibration and shock modes(level 1 to 16) to correct barking, chewing, biting, digging and other dog's behavior problems 984 to 3000 ft range, IPX7 waterproof. This shock collar for dogs made with 434MHz technology, when there are obstacles, it can reach at least 985 ft, and the farthest open area without obstacles can reach 3000 ft. You can train your dog indoor, outdoor easily and freely. Collar receiver with IPX7 waterproof tech, no-worry about malfunctions when it in water Rechargeable, long battery life. This small dog shock collar with portable USB charging method can be fully charged in 2 hours and is convenient to carry For 8 to 90 lbs dogs. With lighter and smaller receiver, the 27 inches long adjustable collar strap is suitable for dogs from 8 to 90 lbs. (Suitable for dogs over 6 months old) The on off button is more like a security lock, which can prevent the dog from being touched by mistake and can be safely placed in your pocket