Esky EP-R200-B2 Remote Control Pet Dog Training Collar Static Shock and Vibration Correct your dogs individually with a shock and vibration or correct 2 dogs simultaneously with a vibration Different colored belt(black and red ) for ease of training. Polyurethane (PU) construction makes the belt extremely durable, long lasting and lightweight Ergonomic remote control with waterproof receiver. Remote powered by a 6F22/9V battery (INCLUDED) and receiver powered by a built-in Li battery (rechargeable) Adjustable strap from 12 to 30 inches long. Will work with dogs from 15 to 120 pounds dogs Comes with a one-year warranty and a hassle-free customer service by Hisgadget Inc