Feature:1. Safe and reliable, using highquality gas sensors, accurate measurement results and stable performance.2. The highstrength shell is made of engineering plastics and composite nonslip rubber, dustproof, explosionproof, and smooth to the touch.3. Multiple combustible gas detection compound gas monitor, suitable for a variety of use environments.4. LCD can display realtime data and system status, LED, sound, vibration indicator alarm.5. Builtin 1800mAh lithium battery, long battery life, quick response, convenient and quick gas detection.Specification:Item Type: Combustible Gas DetectorMaterial: Engineering Plastic + RubberPurpose: Gas Detection of Combustible + CO + H2S + OxygenWorking Voltage: DC 3.7V (Built-in Lithium Battery Capacity 1800Mah)Accuracy: 5%FSResponse Time (90%): <30 seconds.Indication Mode: LCD display real-time data and system status, LED, sound, vibration indicating alarmStorage Conditions: Temperature: -10-55C; Humidity: <85%RHOperating Conditions: Temperature: -20-50C; Humidity: <95%RH, Non-CondensingCharging Time: 6-8HStandby time: >8h (with Slight Changes in Working Status)How to Use:Connect the power supply and press and hold the power button to turn on, the function of the power button: long press the on/off button, short press to return; left button: forward, up, decrease and other functions; right button: backward, down, increase and other functions; confirm Button: Confirm function..Package List:1 x Detector1 x Tool Box1 x Hose 1 x Calibration Cover1 x Metal Nail1 x Charging Cable1 x Charging Head 1 x Instructions