Dogtra eF-3000 Extra Collar

Features * Waterproof collar/receiver * Pager/vibration signal that warns the dog prior to electrical stimulation/correction * Five levels of intensity control on each collar/receiver, to match each dog's temperament * 2-hour rapid charge Lithium Polymer batteries * Sleep mode to save battery life when your dog is playing safely within the boundary * Fits dogs as small as 10 lbs (Receiver weight : 4.0 ounces)