JSX PM2.5 Detector, with Data Storage Function Wall-Mounted Air Inspection Instrument Dust Monitor 3-Inch Large Screen

Supports to download stored record, real time sampling, print charts and data, Auto storing data every 4 seconds Alarm duration adjustable via computer, High precision sensor, real time detecting, Audible and visible alarm, Alarm value adjustable range: 0~500?g/m3 3 3.0 Inco HD Digital Tubes, Energy saving digital tube to display PM2.5 data Support external speaker with 3.5mm audio cable, Back side with 4 holes for wall mounting the detector on the wall LED light to indicate air conditions: green for good, yellow for worse, red for bad