【2600ft Remote Range and Built-in LED Light】 The remote control range of this training collar up to 875 yards (2600ft) if there is no obstacle nearby, easily train your dog in the park or backyard, don't worry it runs too far. Built-in LED light on the receiver and remote help you locate your dog even in a dark environment. 【Safe Humanistic Dog Training Collar】 Extra conductive silicone is safer than other metal one, shock head would not contact the skin directly, protecting your dog from skin damage. The adjustable collar fits neck size from 7 to 25.6 inch, you can choose the most comfortable size for your dog 【4 Training Modes】 Light, beep, 1-100 levels vibration and 1-100 levels static shock modes can be used to help correct barking, walking, leash training, sitting, aggression, and other behavioral obedience. NOTE: This dog shock collar is recommended for medium and large dogs. Please use shock mode carefully, especially higher level shock should always be the last mode to use 【Waterproof Shock Collar】 The receiver is IP65 waterproof, you can train your dogs at the beach and seaside, but please don't put it in the water for a long time. 【Control Each Collar Separately or Together】 If you want to control each collar separately, you can pair receivers in different channels. If you want to control each collar at the same time, you can pair receivers to the same channel. We provide a detailed user manual about how to use this dog training collar and how to train your dog safely and effectively.