4 wire smoke detector for charging pile

{"cid":"91221733","title":"White 4 Wire Smoke Detector DC12V DC24V Fire Alarm Smoke Detector With Relay Output","imgUrl":"https:\/\/img.chinax.com\/nimg\/a5\/cd\/ff7299621d5ba04bade8cc906f42-200x200-1.jpg","attrs":{"Price":"negotiable","Brand Name":"XHA","Model Number":"XHA8011","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":"Smoke Detector with Relay Output","Rated Operational Voltage":"DC12~24V","Contact capacity":"1A DC24V (NO\/NC optional)","Sound Pressure Level":"Above 65dB","Appliction":"Security System,Industrial Control Equipment","Specification":"D105mm, H50mm","Type":"Smoke Alarm","Application":"Industry, Communication Electronic Products, Special Equipment"}}