Aetertek AT-918-2 Remote Shock Control Rechargeable and Waterproof Pet Dog Training Collar with Shock, Vibrate and Beep Dog Brak Collar for 2 Dogs Remote training collar with unique design. Rechargeable and 100% waterproof receiver. With 2 receivers so you can control your dogs separately or at the same time Purpose-designed big and glove-friendly rubber buttons to withstand repeated usage Provides a professional 0-9 adjustable levels of Shock, Beep, Auto anti bark, Strong Vibration enough to get your dogs' attention With adjustable TPU strap length from 6-25"/15cm-65cm, suitable for all dog size from 15-150lbs, especially for medium or large hunting dogs