and easy to install. Fine workmanship and perfect style. Type: Digital Dust Sampler Flow range: 180 (L/min) Continuous working time: 240 (min) Measuring range: dust PM2.5 temperature and humidity Working temperature: 0-50 (℃) Power supply: built-in lithium battery 1000mah, USB charging, including charging cable size: 100 x 95 x 47mm Material: ABS colour: White Package Contents: 1 x detector 1 x usb cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.