Aetertek AT-216D 550 Meters Remote Range Dog Training Shock Collar Water-proof For 3 Dogs Shock Vibration and Beep 2017 newest model. Can be used as 1 dog,2-dog or 3-dog remote dog training shock collars system (This listing is for 3 dogs with 3 receivers) Dog training collar with Vibration, Shock and Beep tone correction mode.0-7 adjustable levels for shock correction Rechargeable waterproof and submersible receiver.Aetertek collar use the most advanced design, electromagnetic induction switch solution, on the power ON/OFF switch to ensure unlimited accurate switch, more convenient and reliable. Remote control dog trainer up to 600yards (approx. 550 meters), suitable for all dog size from 15-150lbs CE,ROHS,FCC,RTTE Approved.1 Year manufacturer warranty