MagicEcollar Remote Control Two-Dog Trainer: Rechargeable Collar Receivers Delivering Vibration and Shock for Each Dog Remote training dog collar to train your dog remotely with a range up to 400 yards/1200 feet; Strong humane Vibration command to stop barking or other undesirable behaviors; Shock buttons for each dog;shock levels: Low (L) or High (H). Adjustable dog collar strap fits 6-25"/15cm-65cm small, medium or large dogs; Remote has large color-coded buttons for easy access; remote has two-tone rubberized coating that looks and feels great.