SNDWAY SW7500A 4 In 1 Gas Detector Combustible Gas Oxygen Hydrogen Sulfide toxic and Harmful Detection Explosion-proof 1. Display error: +-5%FS 2. Response time: less than 30 seconds 3. Display mode: LCD displays real-time data and system status, lights, vibrations and real-person recorded voice (Chinese and English) prompts 4. Working environment temperature: -10 - 55 degrees Celsius, humidity less than 95%RH condensation 5. Working voltage: DC 3.7V 6. Battery capacity: 2000mAh lithium battery 7. Charging time: about 2.5h 8. Full battery life: about 10h (air pump off) 9. Charging specifications: Type-C DC 5V 1A 10. Protection level: IP65 11. Sensor life: 1 year 12. Sensor principle: electrochemical and catalytic combustion 13. Size: about 13.3 x 6.7 x 3cm 14. Weight: about 210g Features: 1. Can detect a variety of gases: carbon monoxide, hydrogen sulfide, oxygen, combustible gas 2. High-definition LCD display, supports ChineseEnglish bilingual 3. Rich alarm methods, real-time feedback of gas leak detection 4. Use Type-C cable for charging, large capacity to meet daily needs 5. ABS dust and explosion-proof, drop-proof, wear-resistant, splash-proof 6. 500 sets of data storage, you can view the peak value of previous measurement records through the curve