Aetertek AT-216D Waterproof 450m Remote Control 2 Dog Training Anti Bark Shock Collar 2017 Newest Model 216D 2 dogs shock collar. As 2 dog training system, can be upgraded 3 dogs trainer if add extra collar Vibration, Beep and 0-7 adjustable level of Shock correction mode. 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 Rechargeable 100% waterproof receiver collar, your dog can wear this trainer when swim o leaking concern when pet in the shower, swimming, diving and other under water condition Remote range up to 500 yard (approx. 450 meter), suitable for all dog size from 15-150lbs CE,ROHS,FCC Approved. 1 Year warranty.