Aetertek At-211sw Small Dog Shock Collar Water-resistant Dog Trainer Rechargeable 2 Dog Cat Training Shock Vibrate Anti Bark Collar UPDATED 211D. use the most advanced design, electromagnetic induction switch solution, on the power ON/OFF switch to ensure unlimited accurate switch, more convenient and reliable.Can be used for 1 dog and 2 dogs training system, this listing is for 2 dogs collar including 2 rechargeable receiver and 1 remote Solid 350M (400Yards) remote range, fit dogs from 6 lbs to 50 lbs with a receiver neck size from 2" to 9" long Beep tone function + vibration correction + 10 Levels of progressive shocks. Water-resistant dog shock collar, pls DO NOT make your dog swim with it. Quality TPU collar with high strength&toughness, easy to clean and cut. Convenience, Easy-to-read LCD screen shows the stimulation level. Dog trainer CE, FCC, RTTE, ROHS approved. 1 year warranty.