SURFOU Wireless Doorbell, Waterproof Twin Plug in Door Bells Cordless Dual Door Chime Bell Battery Operated at 1,300ft Long Range Doorbell Kit with 2 Receivers, LED Flash 55 Chimes 5 Volume, Black

With a wireless range up to 1300 ft, the signal reaches through walls and across floors - so you can hear the chime clearly whether you're in the kitchen, upstairs, or at the far end of the house. No more missed visitors because you didn't hear the bell. No wiring, no tools needed. Plug the receiver into any indoor power outlet, then mount the button on your exterior wall with the included adhesive - the whole setup takes under 30 seconds. Use it at home, in the garden, at the office, or on a mailbox. Engineered for all-weather durability, this dust and waterproof radio doorbell endures temperatures from -30°C to 70°C. It withstands harsh conditions while boasting extremely low power consumption for a 1-3 year long-lasting battery life. The plug-in receiver offers 55 chime melodies and 5 volume levels from 0 to 110 dB, so you can pick a tone you actually like and set it loud enough to hear from anywhere. A built-in memory chip keeps your last settings after a power outage - no need to reprogram every time. Need coverage in more rooms? Add extra receivers or push buttons of the same model to expand your system - place one receiver upstairs and another in the basement, and every button will ring them all.