Hispec HSSA/PE/FF10 Mains Photoelectric Smoke Alarm - Fast Fix Base\r\n- This Fire alarm is powered by one 9V battery(included).- When an intermittent "chirp" accompanied by a red LED flash every 32 seconds indicates a low battery.- When the alarm senses products of combustion and goes into alarm, the red LED will flash rapidly.- The rapid flashing LED and the pulsating alarm will continue until the air is cleared or the test button is released.- It should be installed in every room and also use in the bathroom and kitchen.\r\nThe Hispec HSSA/PE/FF10 Mains Photoelectric Smoke Alarm - Fast Fix Base is powered by one 9V battery(included). The Hispec Photoelectric Interconnectable Fast Fix Mains Smoke Detector can Interconnect up to 20 wired detectors and comes complete with a Fast Fix base. As the sensor can click on the fast fix base, the installation becomes far easier and quicker. It is making sure the people in your home will be able to hear and respond to the alarm sound.\r\nFeatures:\r\n- 9V Battery Back-Up (Included).- Photoelectric Sensor for Slow Smoldering Fire.- Interconnectable with up to 20 Detectors.- Built-In Test Button.- ROHS Compliant.- Operating Light & Low Battery Signal.- Hush Feature and Insect proof.- Loud 85dB alarm.- Fast Fix base included.- Test function and hush feature.- Body Material: Plastic.- Color: White.- Brand: HISPEC.