The uncomplicated and reliable Honeywell DCR311S doorbell comes pre-linked and is ready to use. Thanks to the dependable wireless connection provided by Honeywell ActivLink™ technology and high sound quality, you can be sure that you won't miss any visitors. Place your portable wireless bell anywhere in your home or garden. The Honeywell ActivLink™ technology offers a reliable wireless range of up to 150 meters, with a volume control of up to 80 dB and a hearing range of up to 60 meters. For added security, the doorbell button is equipped with an LED function indicator. A quick triple press activates a special melody through the secret knock function, letting you know if a family member or friend is at the door. For even more security, wireless bells can be connected to additional security accessories and home alarm sets from Honeywell to expand passage alert systems or create a customized home alarm and warning system. All Honeywell doorbells feature digitally enhanced, crystal-clear sound that can be heard well in both home and garden—even in surprisingly compact designs. All Honeywell doorbells are pre-linked and can be installed immediately. With the optional screwless installation and an easily accessible battery compartment, setup can be completed in just a few minutes.