non polarized 2 wire smoke alarm

{"cid":"91221733","title":"Non Polarized 2 Wire Smoke Alarm 105g For Conventional Detection Alarm System","imgUrl":"https:\/\/img.chinax.com\/nimg\/ee\/5b\/bf30476a57088218996588f7fd93-200x200-1.jpg","attrs":{"Price":"negotiable","Brand Name":"XHA","Model Number":"XHA8015","Minimum Order Quantity":"1","Delivery Time":"3 Working days","Certification":"CE","Place of Origin":"China","Payment Terms":"T\/T, Western Union","Supply Ability":"10000PCS\/Month","Packaging Details":"100pcs\/carton","Product Type":"Conventional Fire Alarm System","Working Voltage":"9 to 28VDC","Alarm Output":"Sound\/Light","Detection Method":"Smoke","Wired":"2 Wired , Non-polarized","Specification":"D103mm, H55mm","Detection Range":"50m\u00b2","Remote Monitoring":"With Remote Function"}}

{"cid":"91197022","title":"Built - In FM200 Fire Alarm System Module","imgUrl":"https:\/\/img.chinax.com\/nimg\/ad\/84\/dc196cbf3232d36a06fa4a42d7a6-200x200-1.jpg","attrs":{"Price":"negotiable","Brand Name":"dingya","Model Number":"KZ-953E","Minimum Order Quantity":"1 set of system","Delivery Time":"10-15 working days","Certification":"CE,CAL,CMA,CNAS,ILAC-MRA,CCC","Place of Origin":"guangzhou\uff0cchina","Packaging Details":"Plywood case or box case","Payment Terms":"L\/C, D\/P, T\/T, Western Union, Paypal, Credit card","Product":"FM200 Fire Alarm System","Usage":"Firefighting","Type":"fire alarm system","Function":"Fire Alarm,Fire detection,Emergency Alert"}}

{"cid":"91188394","title":"KAN101 Catalytic Combustion Type Combustible Gas Detector with Diffusion Sampling and Explosion Proof IP66","imgUrl":"https:\/\/img.chinax.com\/nimg\/b2\/75\/c29e015af70bd2905a5b7a6ff918-200x200-1.jpg","attrs":{"Brand Name":"KACISE","Model Number":"KAN101","Minimum Order Quantity":"1PCS","Delivery Time":"5-8 work days","Certification":"CE","Place of Origin":"CHINA","Payment Terms":"L\/C,D\/A,D\/P,T\/T,Western Union,MoneyGram","Supply Ability":"1000 Piece\/Pieces per Week negotiable","Packaging Details":"each unit has individual box and all boxes are packed in standard packages or customers requests available","Detection Principle and Gas":"Catalytic combustion type: Methane, Propane, Isobutane, Hydrogen","Detection Range and Sampling Method":"Diffusion type: 3 - 100% LEL","Communication Distance":"\u2264 1000m (RVSP1.5mm\u00b2)","Communication Method":"ABUS four - wire bus","Specification":"Cast aluminum \u2264 1.2Kg, 206\u00d7165\u00d780","Explosion - proof Mark and Protection Level":"Ex db II CT6 Gb IP66"}}