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 security keypad lock mode. Extra Long-Lasting Rechargeable Battery: 2 in 1 charging port, can charge the remote and receiver at the same time, charging only needs 2-3 hours, can last long standby time, persistent work. Waterproof Dog Collar & Backlit LCD Display: The receiver of this is made of IPX7 water resistant material. The remote control has an LED backlit display, which can be used at night. Keyboard lock: The locked remote control can prevent accidental misuse and can be carried with confidence. Adjustable collar strap: 8-27.5 inches in length, suitable for dogs from 6 to 140 lbs. Dog training tips for beginners: Before using the dog collar, make sure that the contact points must be in direct contact with the dog's skin on the underside of the neck. Do not wear the