GROOVYPETS 650 Yards Remote Dog Training Shock Collar Obedience Trainer:Rechargeable Waterproof Collar 10 Levels Static Stimulation,Intuitive Control of Tone and Vibration ONE YEAR WARRANTY, MOST USER-FRIENDLY REMOTE DOG TRAINER:Train one dog at a time or two (2-dog model) or 3 dogs (3-dog model) at the same time by pushing a single button; GREAT REMOTE RANGE FOR DOG OBEDIENCE TRAINING: 600 meter/650 yards remote range is probably more than enough for average users; SOLID BUILD WATERPROOF RECHARGEABLE SMALL SIZE LIGHTWEIGHT REMOTE DOG COLLAR RECEIVER: Suitable for indoor and outdoor field trips or hunting. 100% waterproof and long lasting battery (up to 5 days battery life); ONE SIZE REMOTE DOG COLLAR FITS ALL: The high quality training collar for small, medium and large dogs can easily fit 20CM-62CM(7"-24") neck size. You can re-size it or use your own. HUMANE REMOTE DOG TRAINING COLLAR WITH UNIQUE EFFECTIVE CORRECTION FEATURES: Adjustable Tone, Vibration and Static stimulation collar (not electric shock collar) to for small sensitive dog breeds or large stubborn dogs.