Part of the STI Wireless Chime series, this commercial grade wireless doorbell chime with receiver greets your visitors with a pleasant chime and lets you know when the door opens. It has a long range operation up to 500 feet (line of sight) and offers up to 10 selectable sounds. For installation, mount the wireless button next to your door, plug the receiver into any 120 VAC indoor electrical outlet and the chime is ready to operate. Doorbell button is water-resistant.