[1300ft Range in Open Areas]1300ft/ 400m ultra-long connection range in open areas, the strong and stable wireless signal ensures that you can hear the doorbell chime clearly, even if you are a few rooms or on the other floor [5-Level Volume & 55 Ring Tones]The doorbell receiver features 5 levels of adjustable volume from 0dB to 110dB. The sound 55 Ring Tones from classic doorbell sound to rhythmic tunes to suit any conditions. LED Blue lights perfects for the elder, the hearing impaired [Easy to Install] Plug the doorbell receiver into a socket and fix the transmitter with the accessories provided and tear off the insulated film before use. You may install this bell in 3 minutes [Waterproof Doorbell Button]The transmitter is waterproof for raindrops, which ensures perfect performance in the outdoor environment. The doorbell could work between -22 Fahrenheit to 158 Fahrenheit withstand any weather conditions [High-Performance Transmitter]Low power consumption transmitter with high quality battery that boasts 3-year maximum lifespan. Receiver voltage (dingdong bell): 110V-260V Doorbell voltage: 12V Working temperature: -30Celsius - +70Celsius Plug Type:UK plug,it applies to Malaysia, the United Kingdom and so on. colour:White Material:ABS size:81 x 81 x 25mm / 74 x 34 x 18.5mm Package Contents: 1 x Doorbell Button 1 x Plug in Receivers Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.