YCZ Wireless Waterproof Remote Doorbell,Operating at over 500-feet Range with Over 50 Chimes,No Batteries Required for Receiver, Wood grain,(Dark wood) 300 meters transmission range in the oper area. The actual wireless transmission range depends on your using environment. Combine the function of data transmission and charing. Resist high pressure with excellent design. Easily plug receiver into an electrical outlet (no batteries required for main receiver).High quality for you to have one, as it is more sensitive, more stable, and power effective. This product is waterproof.Intelligent memory chip, I7 processing chip, strong anti-interference, actual zero error ring.