DIY Supplies: Woodworking Gas Type: Multifunctional With LCD Screen Or Not: Yes Is Smart Device: YES Function: Detect PM2.5, PM10, formaldehyde, TVOC, carbon dioxide, carbon monoxide, AQI, temperature, humidity, time, date, WiFi function<br><br>Working voltage: 3.7V Current: 260mA Power: 1W Battery: 3.7V, 18650 lithium battery 1200mah Charging: 2-3 hours Full charge available: 240-360 minutes material: plastic Product size: approximately 90.00x70.00x35.00mm Product size: 3.54x2.76x1.38inch Colour:Black<br><br>Package Contents: 1 x Tester<br><br>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.