If you have any questions, please send us an email. We will try our best to answer your questions. Specification: Condition: Brand New Item Type: PM2.5 Tester Material: ABS Color: White Battery Type: Built-in lithium battery USB rechargeable Working Time: 4-6 Hours Working Voltage: 3.7V Battery Capacity: 780mAh Charging Parameters: 5V/1A Working Environment: -20℃-50℃ PM2.5 Resolution: 1ug/m3 PM2.5 Measurement Range: 0-999ug/m3 Product Size: Approx. 5.5 x 5.5 x 3.5 cm/2.2 x 2.2 x 1.4 in Weight: Approx. 188g/6.6oz Package List: 1 x PM2.5 Tester 1 x User Manual 1 x Data Cable Welcome to buy and wish you a happy life.
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