For doors that are meant to be locked or stay closed, Mr. Chime brings you the DA2D wireless magnetic closed entry door sensor and chime. This sensor is designed to alert you when a door is opened or kept open. Two alerts – a one-time “ding-dong” and a continuous “chirp chirp” sound – can be selected, depending on the alert that you need.
The DA2D model is great for fire doors, emergency exits, back doors, basement doors and other entries that should be kept closed. For homes, this can help deter burglars and reduce energy bills, alerting you to any open doors and helping prevent hot or cold air from leaving the home. For businesses, this can ensure that employees and customers enter through a particular entrance, keep fire door passages clear, and keep employees-only areas safe, while also helping to prevent theft and vandalism. The patented design is easy to install without requiring drilled holes or connecting new wiring. As an additional feature, a doorbell can also be installed to allow entry where needed.
The Mr. Chime ® Inc. Model DA1D is a sensor that is a self-contained, battery operated, magnet activated sensor, with a built-in "pleasant" alerting melody with two different selectable alerting melodies, for closed door applications.
New dual alerting melody designed and offered exclusively by Mr. Chime:
(1) Ding Dong (only one time)
(2) Chirp Chirp
One alerting sound for the front door and a different sound for the back door.