This musical wireless chime is a commercial grade Wireless Doorbell Chime that operates up to 500 feet. Quick and easy to install with no electrical wiring and no expensive through-the-wall drilling. Simply mount the wireless button next to your door, plug the receiver into any indoor electrical outlet and the chime is ready to operate. The chime can also be used as a pager for a person who requires special care. It offers an exceptional operating range of up to 500 feet (line of sight) between transmitter and receiver. Select one of ten sounds with the push of a button on the transmitter. 64 dB – 88 dB at 1 foot. UL/cUL Listed, FCC and IC Compliant.