Feature:Remind you the coming of your guests by lovely songs and LED light.Simple， wireless installation， avoid troubles and save money.Remote control range up to 100m in the open air， suitable for homes and high-rise building.All day long anti-interference system， avoid interferences outside or between neighbors.Waterproof design， you can install it on your gate without worrying about the rain.With this smart doorbell， you will never miss any guests!With 1 remote control(transmitter) and 1 receivers.Specifications:Color: black1.The work voltage of the receiver:110V ， woking current��o?��120mA2.Power��Q2W3.Music: 36 cord music for option4.Sound: 25-80dB ( 4 grade volumes)��?5.Remote Control /Incept Distance��R100m(109 Yard)(in open air)6.Work Frequency ��o315MHz7.Power Plug: US plug8.Work Voltage of the Emitter��o12V(Battery Model��o23A 12V)9.Work Electricity of the Emitter��Q15mA(20 times a day by calculating，a high quality10.LED Indicator��opress the send button��?LED indicator light will flash，Emitter work and the receiver receive the order and then send out the beautiful music reminded you the VIP visit， the blue-ray LED of the receiver will regular flash along with the music.11.This product is of waterproof function and can be put outside the door12.Temperature: -10 ?? ~50 ?? (14��H~122��H��?Package includes:1 x Transmitter1 x Receiver1 x Sticker2 x Screws1 x User manual