Alcohol Breath Analyser is used to check alcohol consumption in human's body. Specification: Analyzing Method: Breath Test Sensor: Advanced semiconductor oxide alcohol sensor Screen: Dual LCD Display, Alcohol Tester LCD / Clock LCD Alcohol Reading: Digital Range: 0.00~0.19 BAC & 0.0~1.9g/l 2 Alert Modes: Real Time 12/24 Hour Clock Countdown Timer Test Accuracy: .01 BAC (.1g/l) Caution: Display Caution symbol and yellow LED flash – .02% ~ .05% BAC Danger: Display Danger symbol and audible beep alert- equal or over .05% BAC Power Source: 2x AAA batteries Dimension: 95mm x 35mm x 16mm (L x W x D)