CACAZI A30 Smart Waterproof Wireless Music Doorbell Battery 300M Remote Button Receiver Home Call Ring Bell

Features 1 The button supports up to 20PCS and the receiver supports up to 100pcs 2 The transmitter without screw chuck design to achieve waterproof and dustproof 3 Eye catching backlight flashes when someone pushes the doorbell Particularly suitable for the elderly deaf 4 Uses machine learning to prevent interference from other wireless transmitters 5 The transmitter USE a 23A12V alkaline battery not include battery 6 The receiver is available in a variety of plugs 7 Receiving distance 300 meters in open area8 The wireless signal will be affected by obstacles The more obstacles the more serious the signal loss 9 Receiver has 4 levels can be mute 0 80db 38 music to choose from 10 Size Transmitter 69x51x20mm Receiver 90x61x31mmNOTE The button cannot be placed on an iron door because it will interfere with the signal How to pair signals Press and hold the volume button of the receiver and the transmitter for about 8 seconds to successfully pair Package includeds 1 x Receiver1 x Transmitter1 x User Manual Details pictures