Aetertek 215C Waterproof Two Pet Dog E-collar Shock Collar Training System Stop Bark Tool 550M Remote Range Easy to use Aetertek classic model,very easy to use,fit for beginners or the elderly. Can be used as 1 dog or 2 dogs remote dog training collar at the same time or separately 100% waterproof and rechargeable collars. Range of up to 600 yards (approx. 550 meters) and signal can pass through obstacles, such as walls and fences Electric remote range up to 550M. 3 correction modes: beep & Shock & Vibrate