Key Features DIY Supplies:ELECTRICAL Origin:CN(Origin) Model Number:SMART SENSOR AS8700A Gas Detector Certification:CE Gas Type:CO With LCD Screen Or Not:Yes Display:4 digit LCD Display Frequency Detecting Range:30Hz-300Hz PM2.5 Measuring Range:0-999?g/m^3 Color: Product name:PM2.5 DetectorWhat?s in the box1X SMART SENSOR CO Detector Handheld Carbon Monoxide Meter with High Precision CO Gas Tester Monitor Detector Gauge Sound AlarmSpecificationsSKU: GE779IP38UF06NAFAMZModel: ACDqitifenxiyi412Production Country: ChinaSize (L x W x H cm): 10*10*10Weight (kg): 0.3Main Material: PVC