[Easy to Install]Just plug the receiver into a socket, mount the doorbell transmitter on the wall or anywhere you want via double-sided tape or screws.    [300m/1000ft Range]Operating range up to 1,000ft/300m in an open area when there are no obstructions.2 plug-in receivers included; will not interfere with other equipment in your home or those of your neighbors; ensures that you will never miss any visitors, even if you are several rooms away.    [60 MELODIES & 5 VOLUME]doorbell chime features 60 unique chimes and ringtones and 5 level adjustable volume (Mute to 115 dB)with night light function.Setting different ringtones for different receivers can let you know which door the visitor is at. LED flashing lights with audio alert indicators which is easy for people including the hearing impaired to notice.    [IP55 Waterproof]IP55 dustproof and waterproof, withstand various harsh weather conditions, suitable for any home, townhouse, apartment, office, school, , hotel, etc.        Plug Type: US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the United States, the Philippines and so on.    size:71.8x39.8x19.5mm    Material:ABS    colour:white        Package Contents:    1 * Doorbell Button    2 * Receivers        Only the above package content, other products are not included.    Note: Light shooting 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.