Connected doorbell and videophone - Universal - Automatic wireless doorbell waterproof 150m remote control without battery button socket bell bell | doorbell (white) Highlights Universal Automatic wireless doorbell waterproof 150m remote control without battery button plug bell bell | doorbell (white) Self-powered wireless doorbell waterproof 150m distance NO BATTERY FLAG BUTTON BUTTON Call ring HOME BELL Bell | Doorbells (white) Features and specifications 1.Press the button, Super Learning code can freely learn to match, can be unlimited matching receiver. 2.Instead of using a battery, the button converts kinetic energy into electrical energy and sends a signal when pressed. 3.The transmitter can work normally in snow or high temperature environment, waterproof and dustproof. 4.If multiple buttons are paired with one or more receivers in the same system, each button can be set to a different ringtone. 5. OFF-Off memory function: Turn the power off again after power off, no need to redefine and lock the ringtone. 6.Ente-catching backlight flashes when someone pushes the doorbell. Especially suitable for elderly, deaf and pregnant women. 7.The receiver voltage is 220V. 8.The receiver is a distance of 150 meters (in an open area), which may be affected by the environment and obstacles. 9.The receiver has 60 ringtones to choose from, and the volume is 0-110DB in 5 levels. 10.Just plug the receiver into a power outlet, the push button transmitter can stick it to the door with adhesive strips provided. 11. Transmitter Size: 70*46*24mm, Receiver Size: 92*62*32mm Note: The button cannot be placed on an iron door as it will interfere with the signal. If the receiver does not ring when you press the button after receiving the doorbell, please pair the doorbell.