Upgrade !!! Aeteretk At-919c Submersible Dog Training Shock Collar 1000m Remote Range Rechargeable Upgrade AT-919C,better quality,more effective LCD Display ,1000M remote control range,let your dogs with freedom New electromagnetic induction way to Turn on /off the device ,more convenience Adjustable 10 levels for shock, beep and vibration function;Sensitive auto anti bar fuction Submersible receiver (100% waterproof)