Features Safe and Effective Training Modes: Wireless control up to 1650 feet remote range. 5 adjustable training modes, safe and effective. Beep, emergency flashlight, 0-99 levels vibration, 0-99 levels shock and safety keypad lock mode. Extra long lasting rechargeable battery: charging port 2 in 1, can charge remote control and receiver at the same time, charging only need 2-3 hours, can long standby time, persistent work. Waterproof dog collar and backlit LCD screen : The receiver of this training collar is made of IPX7 water resistant material. The remote control has an LED backlit screen, which can be used at night. Keypad lock: The locked remote control can prevent accidental misuse and can be carried around with confidence.< br/> Adjustable Collar Strap: 8-27.5 inch length, fits dogs 6-140 lbs. Dog Training Tips For The Beginner: 1. Before using the dog training collar, make sure the contact points should be in direct contact with the dog’s skin on the underside of the neck. 2