1. Color screen display, humanized interface 2. Bilingual options: Chinese/English 3. Three types of alarms: sound/light/vibration 4. Data recording and viewing function, continuous recording of 120,000 pieces of data 5. Using high-quality gas sensor, safe and reliable, accurate measurement, stable performance 6. It has excellent sensitivity and repeatability, easy to use and maintain, and meets the requirements for high reliability of equipment in industrial field safety monitoring 7. The shell is made of high-strength engineering plastics and composite non-slip rubber, dust-proof and explosion-proof, high strength, and smooth hand feeling 8. Measuring range: 0-30%VOL 9. Resolution: 0.1 10. Response time (90%): less than 30 seconds 11. Working voltage: DC 3.7V (lithium battery capacity 1800mAh) 12. Battery model: LP103450-1800mAh 13. Charging time: 6-8h 14. Standby time: more than 8 hours (with slight changes in working status) 15. Size: 71x153x49mm 16. Weight: about 215.4gSpecification: General Certificate CE Package Weight One Package Weight 0.86kgs / 1.90lb One Package Size 27cm * 19.5cm * 6.5cm / 10.63inch * 7.68inch * 2.56inch Qty per Carton 20 Carton Weight 17.83kgs / 39.31lb Carton Size 68cm * 46cm * 31cm / 26.77inch * 18.11inch * 12.2inch Loading Container 20GP: 275 cartons * 20 pcs = 5500 pcs40HQ: 638 cartons * 20 pcs = 12760 pcs