This Plug-in smoke and fire alarm from Spectronics Corporation has a very loud alarm and a flashing strobe. It is ideal for use with the deaf or hearing impaired. Features include:

• The bright flashing strobe light alerts deaf or hearing impaired individuals to alarm activation.
• Single-station/multiple-station smoke alarm provide early warning of smoke with photoelectric sensing.
• The portable LS series devices are equipped with a 9 foot line cord that lets you instantly equip any room with a 177-candela (very bright) visual and 90-decible (very loud) audible signal, all in one device
• 9 VDC battery backup w/audible low battery chirp on selected models