Safety Technology Knock Knock Door Chime 30092

Wireless door chime for hard-of-hearing households

The Safety Technology Knock Knock Door Chime 30092 is a wireless sensor and receiver set designed for homes or offices where knocking is easily missed. A vibration sensor attaches to the door and triggers a remote chime whenever someone knocks. Installation uses either supplied double-sided tape or screws, requiring no wiring. The receiver operates up to 100 ft from the sensor, covering large floor plans.

Replaces reliance on audible knocking alone

This system upgrades a standard door that provides no alert beyond the knock itself. The jump is worth it when occupants are frequently in rear rooms, basements, or gardens where a knock cannot be heard. It also helps households with hearing impairment or heavy interior doors that dampen sound. No electrical work is needed, so renters can install and remove it without damage.

Limited to vibration detection on a single door

The sensor only responds to physical knocking vibrations on the surface where it is mounted. It will not detect a doorbell press, motion outside, or entry through other doors unless additional sensors are purchased. Wireless range is rated at 100 ft, but walls and interference may reduce effective coverage. The system provides no smart-home integration, video, or remote notifications.