Doorbell Battery-Operated 200M Remote Waterproof 4 Volumes 36 Rings Intelligent Door Chime Cordless Doorbell

Press the button, super learning code can freely learn to match, can be unlimited matching receiver and button. The transmitter without screw chuck design to achieve waterproof and dustproof. The transmitter USE a 23A12V alkaline battery (not included battery). The receiver uses 3 AA alkaline batteries, no need to plug in the power supply, and the battery can be used.(not include battery). Receiving distance:200 meters in opening area. The signal will be affected by obstacles. The more obstacles, the more serious the signal loss. Receiver has 4 levels 20-80db,36 music to choose from. Transmitter size:80*45*20mm Receiver size:120*85*30mm The receiver can be hung on the wall or standing on the table. The button can be attached to a wall or door using double-sided tape or screws. Note: The button cannot be placed on an iron door because it will interfere with the signal. connect to smart phone , please install APP IP doorbell.