Long Range doorbell transmitter may be up to 1000 feet (300 meters) away from the ringing receiver in the open. Whether you are in the bedroom or the kitchen. Never be concerned about losing out on guests. Easy Installation wireless doorbell doesn't need any wiring or experience to set up. It has two receivers (indoor units) that run on household power (100-240VAC-50/60Hz) and can be set up by anyone. No battery doorbell features 36 tunes and 4 adjustable volume levels ranging from 0 to 120 dB adjustable volume levels for any kind of application. No Interference Doorbell wireless doorbell uses digital coding to keep other doorbells from interfering with each other. This way, there will be no interference between other doorbells that are nearby. A wireless doorbell for everyone Due to the easy installation and beautiful ring chimes, the doorbell is suitable for use in homes, offices, hotels, buildings, dormitories, factories, construction sites, etc.