Aetertek AT-918 550M/ 600 Yard Waterproof Remote Control Training Collar Shock Trainer for 2 Dogs Purpose-designed big and glove-friendly rubber buttons to withstand repeated usage 600 yards (550m) remote control range Adjustable 9 levels for shock correction, beep and vibration function. Submersible receiver (genuine waterproof). Adjustable TPU strap, it will work for small, medium and large dogs weighing from 15 to 150 lbs.