Highly waterproof receiver- Waterproof level IP67, great for indoor or outdoor behavioral and obedience training, field trip, hunting, rain even swim. Long distance contral- Operational range is up to 450 yards! Both receiver and transmitter are Rechargeable. 3 Training modes- Vibration, electric shock and beep. 16 levels for vibration and electric shock. Humanity design- Separate buttons and big blue backlight LCD screen make it easy to press and read. Quickly and safety- Swap quickly between collar receivers with dog selector switch.100% tested dog training collars.