Signolux Sound Monitor Transmitter Hearing your fire alarm or other home safety alerts can be difficult if you suffer from hearing loss. The Signolux Sound Monitor Transmitter, however, can help you see/hear/and feel your home alarm alerts when paired with any Signolux Receiver (sold separately). What is the Signolux Sound Monitor Transmitter? The Signolux Sound Monitor is designed to alert you to home safety alerts via sound, visual or vibrations. It is capable of learning and recognising up to three different alerting sounds via the three buttons on the top of the device. The sounds must be exactly repeatable, and no different than when they were taught.   The Sound Monitor then sends the according alert to all active Signolux receivers (Sold separately) within range, which will translate these alerts to visual, audio or as vibrations. It is possible to reprogram the device at any time. The Signolux Sound Monitor makes it possible to expand the functionality of the Signolux alerting system by 3 individually defined sound sources, such as tones from timers, specific ringtones, or alarm sounds of sensors such as CO2-detectors and smoke alarms for the ultimate home safety. ............................... For use with Signolux receivers (purchased separately). Learn more about the Sound Transmitter and the types of receivers available here. Supplied with 3 AA rechargeable batteries and UK power supply unit. The Batteries are for backup in the event of a mains power failure.