YIFAN EU US AU Plug Wireless Doorbell Waterproof smart home Door bell chime 300M Remote AC 110V-220V 2 emitter 3 Receiver no battery FXA Highlights: 1.With up to 300m operating range in open space,100m audible range. 2.The transmitter 12V23A battery factory pre-installed (no include battery) 3.Simple to use and easy-to-install without the hassle of running any wires. 4.52 ringtones(16 chord)to choose from and 4 steps volume control(25~110dB). 5.IP44 waterproof transmitter 6.Eye-catching backlight flashes when someone pushes the doorbell. 7.Different quantity of push unit(transmitter) and chime unit(receiver) are free to pair together. 8.If paired multiple push units in one system,the chime can be set to different for each push unit. 9.Easy to choose your change and select your favorite ringtone with forward and backward button. 10.Approved with CE,FCC,RoHS certification. 11.Remote control button longevity design, an average of 5 times a day, you can use for 25 years 12.Receivers Rated voltage : AC 110V-220V/50Hz/60Hz 13.Working frequency:433MHZ /315MHZ 14.We can offer EU,UK,AU plug adapter, US country can use it directly. Applicable to multiple countries, 15.Pls leave message of the plug you want when make order otherwise we will ship it according to your country standard.