A great doorbell solution for hard of hearing, the Silent Alert SignWave Doorbell Alarm Pack uses strobing light to notify you of the doorbell being pressed.
A comprehensive alarm system for hard of hearing, the Silent Alert Signwave Hard of Hearing Smoke, Carbon Monoxide and Magnetic Door Monitor Alarm Pack uses strobing light to alert you.
A complete smoke, Carbon Monoxide and heat detection solution for the hard of hearing, the Silent Alert Signwave Smoke, Carbon Monoxide and Heat Alarm Pack uses strobing light to alert you.