Display error:Positive and negative 10% + 50mol/mol (measured as methane) Range:0-10000 Response time:instantaneous Indication mode:LCD display real-time data and system status LED,sound,vibration indication alarm,fault and undervoltage Working environment:Temperature negative 20 Celsius-50 Celsius,Humidity Less than 95% RH (without condensation) Operating voltage:DC3.7V (Lithium battery capacity 2000mAh) Explosion-proof mark:Ex ib IIB T3 Gb Charging time:6h-8h Standby time:more than 8 hours Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on size:20 x 7 x 2.5cm Material:plastic colour:black Package Contents: 1 x Natural gas detector 1 x USB charging cable 1 x EU plug 1 x Manual Only the above package content, other products are not included. Note: Light shooting 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.