A8 Handheld Oxygen Concentration Detector Oxygen Content Monitor Oxygen Detector Oxygen Test Exceeds Alarms

Battery Included：Yes High-concerned chemical：None Is Smart Device：No Measurement Range：0-30%VOL Model Number：A8 With LCD Screen Or Not：Yes Gas Type：oxygen DIY Supplies：Electrical Brand Name：WEIRU Origin：Mainland China Certification：CE,FCC,RoHS temp：-9~55℃ humidity level：0~100%

Battery Included: Yes High-concerned chemical: None Is Smart Device: No Measurement Range: 0-30%VOL Model Number: A8 With LCD Screen Or Not: Yes Gas Type: oxygen DIY Supplies: Electrical Brand Name: WEIRU Origin: Mainland China Certification: CE,FCC,RoHS temp: -9~55℃ humidity level: 0~100%