?<strong>Features:</strong><br />Independent installation on ceilings and walls， with mounting bracket， which is easy to install and do not need to debug.<br />With specially designed cover， can protect it from dust.<br />Built-in dedicated IC: with stable performance and high sensitivity.<br />Photoelectric chamber: can monitor air and detect smoke produced at very early moment of a fire.<br />With alarm test button， can take analog alarm tests of the smoke alarm.<br />With a buzzer， it can give an alarm independently.<br />LED light flash indicator.<br />Low battery indication: when its voltage is under 6.8V， it can give out a warning tone automatically.<br />Can warn and alert people to stay far away from dangerous field when it detects smoke.<br />Suitable for use in homes， shops， schools， office buildings， storage areas， etc.<br /><br /><strong>Specifications:</strong><br />Color: white<br />Material: ABS<br />Power supply: 9V battery (not included)<br />Standby current: ＜12┢A<br />Alarm current: ＜15mA<br />Operating voltage: DC9V<br />Alarm indication: red LED flash & sound<br />Loudness: ◎85dB (within 3m/ 10in)<br />Operating temperature: -10 degrees centigrade to +60 degrees centigrade<br />Operating humidity: ●95%RH (40÷2 degrees centigrade)<br />Detecting area: 60 sqm<br />Item size: 3.4 * 10.7cm/ 1.3 * 4.2in (diameter)<br />Item weight: 100g/ 3.5oz<br />Package size: 10.5 * 10.5 * 4cm/ 4.1 * 4.1 * 1.5in<br />Package weight: 133g/ 4.7oz<br /><br /><strong>Packing list:</strong><br />1 * Smoke alarm<br />1 * Bag of screws<br />1 * User manual