Sonic Alert Doorbell Signaler ONYX Deskset HD At the touch of a

At the touch of a button

Filters that reduce the transmission of shorter wavelengths of light frequently benefit low vision patients

visually impaired

textbook stand

Sonic Alert Doorbell Signaler ONYX Deskset HD At the touch of aExtra loud wireless doorbell works with legacy Sonic Alert alerting systems to let you know when someone is at the door. The indoor outdoor wireless button can be affixed outside, near an existing doorbell, and it communicates wirelessly via RF waves to the actual doorbell signaler inside the house. Signaler sends a message to an existing Sonic Alert receiver or connect a lamp to the integrated lamp flasher and immediately receive a visual cue that