The RNID Sound Advantage Smoke Alarm is a potentially life-saving device for someone who has hearing loss. It's designed to alert you to a fire hazard by making a loud alarm sound and flashing a strong strobe light as soon as smoke is detected. At bedtime the portable base unit should be placed on a bedside table and you can plug the powerful vibrating pad into the unit – and place the pad under your pillow. This will vibrate if smoke is detected.