SA 02 The parameter name Specification Sensor type Semiconductor sensor Measuring Range 0-400mg/100L BAC Sensitivity/Differentiation Rate 5mg/100mL / 1mg/100mL Indication Error '5cmThe distance concentration is 50mg/100mL hours ± 10mg/100mL' Sampling Method 'Air blow induction / manual detection' Continuous Measurement Time 5 seconds to 15 seconds Value Out Time 3 Seconds Operating Temperature -5~45 degree Return to zero time 5 seconds to 15 seconds Datastorage 30000 records Operation Method 4 buttons, the warning light and lighting can be operated independently in the shutdown stat Accessibility 'LED High-bright white light illumination, high decibel whistle, red and blue waring lights, voice broadcast' Display Screen 1.3-inch 240*240 full-color TFT LCD screen Supply Electricity 18650-3000mAh lithium battery USB TYPE-CUSB Charging Coltage 5V/2A Hostsize 360mm*45mm*43mm Weight 260g