Name: Air Quality MeterMaterial: plasticsDisplay: LCD displayBattery: 1 * built-in lithium battery, 3.7V, 1800mAh (included)CO2 measuring-range:350ppm-2000ppmTVOC measuring-range:0.000 mg/m³-2.000 mg/m³HCHO measuring-range:0.000 mg/m³-1.000 mg/m³Temperature measuring-range: 0℃-90.0℃(32℉-194℉), ±1℃/±1℉Item size: 176 * 73 * 29mm / 6.93 * 2.87 * 1.14inItem weight: 222g / 7.83ounceAdopts digital temperature and humidity sensor, high accuracy, stable performance, antijamming ability, low consumption and can provides long service time.Large LCD display, you can see the electricity quantity, CO2 value, TVOC value, HCHO value, temperature, and humidity clearly.℃ and ℉ switchable, and the alarm sound can be on or off according to your demands.Equipped with environmental quality judgment function, it will display appropriate level according to measuring value.Built-in 1800mAh capacity lithium battery, easy to recharge it with USB cable.When the battery is too low, the battery frame flashes to remind you to recharge it.Packing List:1 * Air Quality Meter1 * USB CableNote:Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!Please allow 1-2cm measuring deviation due to manual measurement.Digital Hygrometer Thermometer,Humidity Gauges Monitor Temperature Gauge Indicator Time Display Built-in Clock