28 Chimes 3 Volume 50M Wireless Doorbell Door Bell Waterproof Dustproof LED Dingdong

Features: Easy to Set Up: 1 transmitters included; can add more receivers for increased coverage; simply fix the transmitter on the wall without any wiring; includes 1 screw, 1 anchors, 1 key and 1 double-sided adhesive pads 50M Wireless Range: 1 receivers included; will not interfere with other equipment in your home or those of your neighbors; ensures that you will never miss any visitors, even if you are several rooms away Tailor Your Transmitter: 40 mm stereo speaker delivers rich and crisp sound; 28 melodies and 3 adjustable volume levels with a maximum setting of 110 dB; set a different ring tone for each transmitter so that you know exactly which doorbell has been rung High Performance: The transmitter has ultra-low power consumption; uses 12v 23a battery; IP68 dustproof and waterproof rating; works between -10 C to 55 C; withstands various harsh weather conditions Memory Function: Remembers your last melody and volume level after a power outage; no need to reset to your previous settings; convenient and easy-to-use design for an enhanced user experience Specification: Power consumption: 0.1W Power Supply: Receiver(AC 110-220V) Transmission distance: 164ft / 50m maximum effective range Waterproop: IP68 weatherproof & dustproof Working temperature: -10C to 55C(Receiver) /-20C to 65C(Transmitter ) Volume: 25-110dB Working frequency: 433.92MHz+200KHz Size: 7.5 x 4.5 x 2cm(Transmitter)/9 x 5.8cm(Receiver) Package included: 1 x Transmitter 1 x Receiver 1 x Adhesive patch 1 x User Manual Details pictures: