Description:100% brand new and high qualityPortable and durable, easy to carry, lightweightexhale air alcohol content tester is professional device testing alcohol of human exhaling air alcohol, the sensor is HANWEI electronic advanced namo semi-conduct alcohol sensors, it's good sensitivity and excellent repeating function; testing program is controlled by artificial intelligence design micro-computer controlling, working process is reasonable, simple and portable, full functions, it's many kinds of applicable capabilities;backlight LCD digital character photo displaying, clear and straight; small and portable design is convenient to use.When tested exhaling air alcohol content is over preset value, the device will sound alarming signal, reminding your safety.Advanced flat surfaced alcohol sensorQuick responseSMD assembling, stable performanceDirect testing process LCD indicationDigital LCD display with blue backlightPortable and fashion designAudible warning beyond preset limitSensor fault self checkingBattery saved design,low voltage indicationDigital LCD displaySpecifications:Sensor type: nano semi-conduct alcohol sensorWorking power: DC4.5V( 3 x AAA battery)Undervoltage display: Vcc