DIY.detect smoke fire. Including Alkaline dry battery 9V,Alarm volume: < 95dB 1. Battery operated: DC 9V. 2. Rechargeable li-ion battery 10 year 9 DC battery. 3. Photoelectric sensor. 4. Red LED indicate alarm. Green LED mains indicator light to confirm battery power supply 5. Test button, Low battery alarm 6. Relay contacts-volt free with Normally open and Normally closed options and rated to 24 volts/1 amp resistive. 7. Alarm supplied with connector plug for easy of installation ,built in sounder to give a minimum sound output of 85 dB at 3 m senses smoke using the light scatter principle-quick response to visible smouldering smoke, test button simulates smoke- use to check performance at least monthly, option current <10uA, alarm current<30 UA. Remarks: Delivery time:2~5days after payment confirmation. Mini order: 500units of (combined available) alarm system Payment term: FOB Shenzhen, T/T in advance or irrevocable L/C at sight,Western union Sample cost to be negotiable, Usually sent by TNT,DHL,EMS,FEDEX,UPS International Standard met: CE Possiblity of customers' design: Packing,brand.etc. OEM, ODM. "Warranty policy &#65306;Standard factory hardware warranty&#65288;12 All ATS equipment is shipped with a standard factory warranty of 12 months. During this period, ATS will do all repairs free of charge (material and labor). The faulty parts or units have to be shipped freight prepaid to a ATS regional service center. ATS will pay the freight charges when the repaired parts are shipped back to the customer''s site. Damage of equipment due to improper use is not covered by this warranty.&#65289; &#65292;Extended hardware warranty &#65292;Warranty on repairs &#65292;Software warranty . " 1CTN :10sets of standard alarm system package. Carton size:53*35*41cm The standard package:door sensor "ATS-11", common detector "ATS-81", Need extra more,please add it. Unit Price: to be negotiate Quantity: >500units Delivery: Remarks: Delivery time:2~5days after payment confirmation. Mini order: 500units of (combined available) alarm system Payment term: FOB Shenzhen, T/T in advance or irrevocable L/C at sight,Western union Sample cost to be negotiable, Usually sent by TNT,DHL,EMS,FEDEX,UPS International Standard met: CE Possiblity of customers' design: Packing,brand.etc. OEM, ODM. "Warranty policy &#65306;Standard factory hardware warranty&#65288;12 All ATS equipment is shipped with a standard factory warranty of 12 months. During this period, ATS will do all repairs free of charge (material and labor). The faulty parts or units have to be shipped freight prepaid to a ATS regional service center. ATS will pay the freight charges when the repaired parts are shipped back to the customer''s site. Damage of equipment due to improper use is not covered by this warranty.&#65289; &#65292;Extended hardware warranty &#65292;Warranty on repairs &#65292;Software warranty . " 1CTN :10sets of standard alarm system package. Carton size:53*35*41cm The standard package:door sensor "ATS-11", common detector "ATS-81", Need extra more,please add it.