Dogwidgets New Generation Remote 2 Dog Training Shock Collar for small, medium and large dogs Correct one dog with a shock or vibration or correct both dogs at the same time with a vibration 600 feet range and rechargeable collars Individual shock and vibration button for each dog Correct 1st dog or 2nd dog with 1 hand-held remote control Will work with dogs from 15 to 150 lbs