Features: 1.High accuracy, specially designed for detecting the wine content of human breath, very practical. 2.It adopts advanced namo semiconductor wine sensor, which has good sensitivity and excellent repetitive function and a variety of applicable capabilities. 3.Backlit LCD screen, digital character display, and it is clear, straight for you to see. 4.When the wine content in the tested breath exceeds the preset value, the device will send out an alarm signal to remind you to pay attention to safety. 5.Compact and portable design, only 15x5.5x2.5cm/5.9x2.2x1in of size, easy to use, no complicated operation. Specification: Item Type: Breathalyzer_x000D_ Color: Black_x000D_ Material: ABS_x000D_ _x000D_ Size: Approx. 15x5.5x2.5cm/5.9x2.2x1in(Please allow 1?2mm difference due to manual measurement.)_x000D_ Sensor Type: Nano semiconductor wine sensor_x000D_ Working Power: DC4.5V (3pcs AAA batteries, not included)_x000D_ Use Environment: _x000D_ Temperature: -10-50C_x000D_ Relative Humidity: Less than 95%, no frost_x000D_ Alarm Mode: Blue backlit 3-digit LCD data comparison photo display_x000D_ Exhaled Blood Wine Concentration (BAC):_x000D_ Driving: 20mg/100ml, 0.0909mg/L_x000D_ Drunk Driving: 80mg/100ml, 0.3636mg/L Note: Please allow 1?2mm difference due to manual measurement.