-Material:ABS -Product Size& 65306;130*80*30MM -3.5 inch LCD display - Temperature unit between Celcius and Fahrenheit  Switch -CO2 Technology :  infrared ( NDIR) -PM2.5 Sensor technolology : Laser Scattering -Detection range:    CO2 Detection range:  400-5000 ppm PM2.5 Detection range : 0-999 ug/M3                                                                                 AQI Detection range : 0-500 -CO2 Alarm  value : 1000ppm   -CO2 Alarm  on /off function(if users do not like alarm ,people can turn it off ) -Power supply& 65306;rechargeable  Li-battery 2000mah includding USB Chargeing cable -Included:Main Unit+manual+charging cable Advantage :  -Integrated detection with CO2/Temperature/Humidity/PM2.5/PM1.0/PM10/AQI -Auto calibration ,Exceeding Alarming with auto detection and auto measuring -Support different interface switching. -support History Records  save -Screen off time: never, 1min, 10min and 30min, can save power . - suppot adjusting screen brightness  :25%, 50%, 75%, 100% and auto. -Temp unit:  Celcius and Fahrenheit  Switch       -support Alarm sound set: On and off Package details& 65306;  Product N.W.& 65306;225g  Product G.W.& 65306;368g  Package Dimension& 65306;11.5x11.5x7.6cm CTN Dimension& 65306;54*26*40cm  CTN Weight: 10.5KG 20sets/CTN