Product Name: ADKS-4 Gas Detector Measuring gas: oxygen carbon monoxide hydrogen sulfide Display error: less than 5% Response time: TLess than 30s Indication : LCD displays real-time data and system status LED, sound, vibration to indicate alarm, fault and undervoltage working environment: Temperature: 20Celsius~50Celsius; Humidity: Less than 95%RH without condensation Working voltage: DC3.7V (Lithium battery capacity 2000mAh) Charging time: 6h~8h Standby time: more than 8 hours Protection class: IP65 Size: 130x65x45mm Weight: about 0.5kg Colour:orange Material: ABS Package Contents: 1 x Multi Gas Detector 1 x English manual Only the above package content, other products are not included. Note: Light 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.