When the smoke detector detect smoke or fire, the detector will send out sounds alarm and flashed light,giving people the opportunity to leave the dangerous area. has a long life, high sensitivity, high stability and other characteristics, widely hailed for its high quality . Smoke Detector Product Description: 1. Product model:AK-218A 2. Photoelectrics sensor 3. high sensitivity 4. Power supplied DC9V battery and back-up source 110V-240V AC mains power supply Supply voltage DC12 to 30 volts 5. Interconnect up to alarms 6. Photoelectric sensor Red LED mains indicator light to confirm mains power supply Green LED mains indicator light to confirm mains power supply 7 Unique" battery missing" lockout 8. Hush feature to silence nuisance alarms 9. Low battery alarm 10. Test button 11. Relay contacts-volt free with Normally Open and Normally Closed 12. Options and rated to 24 volts /1amp resistive 13. High sensitivity 14. Alarm supplied with "connector plug" for ease of installation The advantages for this smoke detector contain two points: 1.Has the good performance of anti EMI interference, if you install it near the fluorescent light, it will not alarm, while other supplier¡¯s detector may alarm all the time. 2.The smoke detectors of 10-20pcs could be joined together, if one spot has problems, the detector on this spot will not only alarm, but also flash light; If other spot has problems, the detector may only flash light, not alarm. Smoke Detector Application Application for household kitchen, gas station and Co-operated with gas company, fire-fighting company, property management company, housing corporation, Construction engineering Company Information£º We are the professional household gas detector alarm manufacturer with 12 years experiences, mainly produce Household Combustible gas Leak Detector Alarm / Carbon monoxide Detector/ Compound (gas & CO, heat & smoke, gas & smoke & CO ) Detector/ Smoke Detector / Heat Detector, Solenoid Valve, Manipulator with good quality and competitive price. Welcome to China and visiting our factory!