GROOVYPETS 600M Remote Training Shock Collar Rechargeable Waterproof Trainer,10 Levels Static Stimulation,Intuitive Control of Tone and Vibration HUMANE REMOTE DOG TRAINING COLLAR WITH UNIQUE EFFECTIVE CORRECTION FEATURES: Adjustable Tone, Vibration and Static stimulation (not electric shock) to meet different remote dog training needs; ONE SIZE TRAINING COLLAR FITS ALL DOGS: The high quality collar can easily fit 20CM-62CM(7"-24"). You can re-size it or use your own. 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); BEST USER-FRIENDLY REMOTE DOG TRAINER:Train one dog at a time or two or 3 dogs at the same time by pushing a single button;