If you have a home or apartment that has not been pre-wired for a doorbell, getting one professionally installed can be a costly upgrade. The Wireless Doorbell Chime and Light with Table Stand is an affordable alternative to getting a wired doorbell unit. The transmitter will wirelessly communicate with the receiver up to 100 meters away. Each can be mounted, and optionally the receiver comes with a stand that you can take with you throughout your home; this offers the flexibility to put each unit in the most convenient place for you. The receiver can be used as a doorbell, as a doorbell in conjunction with a signal light, or it can operate in silent mode with no sound and just the signal light. The receiver also has three adjustable volume levels: quiet, medium and loud. This simple solution can be up and running in minutes at your home or apartment; it can even be used on trailers, motor homes, dorm rooms and offices. RF Communication The receiver and transmitter communicate via radio frequency (RF) and use one out of 4096 codes, which are changeable, to minimize the chance of interference from other RF devices. It is also recommended to avoid mounting the receiver on or near other electric devices to avoid RF and electrical interference.