SCIENISH Wireless Doorbell, Plug in Waterproof Cordless Doorbell with LED Flash, 1000 Feet Long Range with 60 Chimes 5 Volume Levels 1 Push Button & 1 Receiver for Home, School, Office, Black

The straight-line remote control distance of this product has been strictly tested to be no less than 300 meters. It can meet the needs of different home environments. It is no problem for ordinary homes to separate anti-theft doors and several walls.
AC doorbell, receiver (indoor unit) use household power supply, just plug it directly into the socket, no battery, convenient for environmental protection! The transmitter (outdoor unit) uses one battery for about one year.
Super reception is suitable for homes, office buildings, hotels, buildings, dormitories, factories, construction sites, etc.
Using the same doorbell in a range will not interfere with each other! The use of wireless high-frequency transmission technology, same frequency and different codes, effectively avoids the troubles caused by mutual interference and false noises between neighbors.
The transmitter is designed with waterproof design, which meets the IP44 waterproof standard, which can prevent rainwater from intruding and effectively extend the service life of the product.
SCIENISH offers a 3-month warranty.