The uncomplicated, reliable Honeywell DC315S doorbell features a sleep mode that suppresses ringing for 3, 6, 9, or 12 hours, allowing you to relax undisturbed. The innovative light ring informs you of a visitor's presence when the doorbell cannot be heard. Connect your existing door button to your wireless chime and never miss a visitor or delivery again, thanks to the volume control of up to 84 dB with an audible range of up to 80 meters. With individual volume control and the innovative sleep mode, you can enjoy peace without interruptions. The HALO light ring and LED strobe provide visual notifications in loud environments, alerting you to visitors when the doorbell cannot be heard. For added security, the door button is equipped with an LED function indicator. A quick triple press activates the secret knock function, playing a special melody that signals a family member or friend is at the door. For even more security, Honeywell's innovative ActivLink™ technology allows wireless chime devices to connect with other Honeywell security accessories and home alarm systems, expanding them into passage detection systems or a customized home alarm and warning system. All Honeywell doorbells offer digitally enhanced, crystal-clear sounds that are easily heard throughout the home and garden, and they are surprisingly compact. All Honeywell doorbells come pre-installed and are ready to use immediately. With optional screwless installation and an easy-to-open battery compartment, installation can be completed in just a few minutes. The receiver can also be powered without batteries using an optional plug-in power supply with a micro-USB connection.