Multi Gas monitor Smart Sensor ST8900 4 in 1 Detector

ST8900 4 in 1 Digital Gas Detector O2 H2S CO LEL Handheld Mini Gas Analyzer Air Monitor Gas Leak Tester Carbon Monoxide Meter Features: 1.Portable monitor for detect O2, CO,H2S, LEL. 2.Respond quickly, detect precisely, sound,light,vibration three types alarms indication. 3.With portable plastic case, built-in sponge, no need to worry damage in the delivery. 4.USB powered, convenient to use. 5.Large LCD screen display, can read in dark. Description: 1.Able to set alarm gas concentration, password, digital and intelligent. 2.Reliable and safety, certificated by CE,ISO etc. 3.Widely used in factory, home, office, and public place. Specification: Model: ST8900 Color: Orange Plug Type: US CO Sensor Range: 0-999ppm CO Sensor Resolutio: 1ppm H2S Sensor Range: 0-500pp H2S Sensor Resolutio: 1ppm O2 Sensor Range: 0-30%VOL O2 Sensor Resolutio: 0.1% LEL Sensor Range: 0-100%LEL LEL Sensor Resolutio: 1% Operation Current: 230mA Short-circuit Current: less than 3A Operation Voltage: 3.7V Max Open-circuit Voltage: less than 4.2V Battery Type: BL-9C Screen: Segment type LCD Operation Humidity: 15%-95% Operation Temperature: -10-50℃ Storage Temperature: 0-40℃ Battery Working Time: 6 hours (no alarm) Item Weight:250g/8.82oz Item Size:135 x 75 x 40mm/5.31 x 2.95 x 1.57in Package Information: Package Weight: 770g/1.70lb Package Size: 253 x 210 x 57mm/9.96 x 8.27 x 2.24in General Box Package Package List: 1 x Gas Monitor 1 x Charging Adaptor(US) 1 x USB cable 1 x Plastic Case 1 x User Manual