Wireless Doorbell Plug in Waterproof Doorbell 2 Receivers and 1 Transmitter for Home Office Hotel Dormitory

AC doorbell, the receiver (indoor unit) using household power, plug directly into the socket, no battery, environmentally friendly and convenient! The transmitter (outdoor unit) uses a battery for about one year. Wireless doorbell super reception, suitable for home, office building, hotel, building, dormitory, factory, construction site, etc. A range using the same door bell, will not interfere with each other! Using wireless high-frequency transmitting technology, the same frequency and different code, effectively avoiding mutual interference between neighbors and the trouble caused by misfiring. Warmly remind: this product is open without obstacles straight line remote control distance by strict testing not less than 300 meters. Can meet the needs of different family environments, general family isolated security doors and a few walls are no problem. Product features. Anti-interference will not appear crosstalk Receiver intelligent flashing light Long-distance wireless reception signal Adjustable volume and music installation is simple and easy to use (default ding dong ding dong) 3 adjustable volume 38 music optional Product Details. Working range: 300M Music selection: 38 music (default ding dong ding dong) Volume selection: 3 levels of volume Power supply voltage: receiver support AC 100-240V AC doorbell: transmitter with a 12V23A battery, receiver plugged directly into the power