Feature: 1. Fast and Accurate: With a 32 bit microprocessor and high speed, high precise processing circuit, this gas concentration detector ensures quick and accurate measurements. 2. USB Interface: The combustible gas detector has a USB interface that allows for easy communication with a computer, enabling data export and deletion. 3. 3.5 Inch TFT Color Display: With a resolution of 480x320 and intuitive function indicator, the display provides clear and comprehensive information for easy operation. 4. Extensive Data Storage: The gas alarm detector can store up to 100,000 historical data points and 1,000 alarm records, with the flexibility to adjust the storage interval for historical data. 5. Simple Operation: With user friendly buttons for parameter viewing and adjustment, the detector allows for seamless operation and customization. Specification: Item Type: Gas Concentration Detector Shell Material: PC Protection Grade: IP65 Accuracy: ≤±3%F.S. Main Units: ppm, ppb, mg/m3, ug/m3, % VOL, % LEL, etc. Working Environment Temperature: -20~50 ℃ Working Environment Humidity: 10 to 95% RH non condensing Data Interface: Mini USB (trapezoidal interface), integrated with charging interface Charging Interface: 5VDC, integrated with data interface Battery Capacity: Rechargeable lithium battery 5400mAh x 1 (built in) Detection Method: Pump suction type, adjustable pump speed. Package List: 1 x Gas Concentration Detector1 x Detection Head1 x USB Cable2 x Key1 x Storage Case1 x User Manual