Aetertek At-215 Rechargeable Dog Bark Control Collar, Wireless Dog Shock Collar, Remote Control Dog Training Shock Collar with Shock and Vibrate As 1 or 2 dogs remote control dog training collar system (AT-215-1 for 1 dog training; AT-215-2 for 2 dogs training) Strong shock + weak shock + strong vibration to get your dog's attention, suitable for dogs from 15 to 150 pounds Solid remote working range up to 600 yards (550m) and signal can pass through walls and fences Remote is equipped with big and easy-to-push buttons, user friendly. Receiver is rechargeable while water-resistant, pls DO NOT wear this trainer when swim CE,ROHS,FCC Approved. 1 Year quality warranty