1Rechargeable Battery: Built in 1500mAh rechargeable battery, lasting up to 6 hours 2Storage Function: BT APP stores 60 , 24 groups and 1440 groups of data. The APP can read up to 1440 groups of data for 60 . All 5 parameters can be used 3Portable: Large, color and simple reading display. LED digital display, smart backlight for eye protection, simple 1 button operation 4Use Way: Can check air quality from anywhere, or you can leave the device on for continuous monitoring in specific locations 5Strong Anti Interference Ability: Strong anti interference ability, low power consumption, long service life Item Type: Air Quality Detector Material: ABS CO2 Detection Range: 400-6000 PPM 50 5%PPM TVOC Detection Range: 0-2.0mg/m HCHO Detection Range: 0-0.6mg/m Measurement Accuracy: 1ppm Temperature Range: - 10 - 50 Power Supply: 18650 Lithium Battery 1500mah (Delivered with a Built in Battery) Product Size: Approx. 9 x 7 x 3.5cm / 3.5 x 2.8 x 1.4in Color Change Warning: 0-800 Green 800-1200 Yellow 1200-1500 Orange Over 1500 Red Weight:Approx. 217g / 7.7oz 1 xAirQuality Detector(Delivered with a Built in Battery) 1 x UserManual 1 x USB Cable