Colour Name:1 Pack Complete Home Protection Smoke alarms cut the risk of dying in fire by 50%, and that's important because the home smoke alarm starts every 120 seconds! The faster you know about a fire, the faster you can start moving your family outside. The smoke alarm with test button allows you to test the unit's functionality. It features a low battery alert to remind you when to change the battery and has a missing battery guard to ensure that a battery is placed inside the alarm. The side battery drawer slides open for easy battery replacement. A blinking power indicator on the unit confirms that it is receiving power. The alarm contains an optional pin to lock the battery and unit in place for tamper resistance. It can be mounted on either the ceiling or the wall and can be used in mobile homes and RVs. Photoelectric technology This is a photoelectric smoke alarm. Photoelectric technology is optimized to detect slow smoldering fires which generate light smoke, little heat and may smolder for hours before bursting into flames.  This smoke alarm does not contain any radioactive material. Smoke alarms should be installed in every room (except the bathroom and kitchen), finished attics and basements, making sure the people in your home will be able to hear and respond to the alarm sound.  Technical Specifications: Power Source: CR17335/CR123A (included) Size(Ø x H):  : 50 x 47 mm Weight: 49g Audio Alarm: Greater than 85dB at 3 meter Temperature Range: 32℉~104℉（0℃~40℃） Humidity Range:10%~90%RH(noncondensing) Box Contains: 1*Smoke alarm 2* Screws 2* Expansion bolt 1*User Manual
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