100% brand new and high quality<br> Portable and durable, easy to carry, lightweight<br> exhale 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.<br> Advanced flat surfaced alcohol sensor<br> Quick response<br> SMD assembling, stable performance<br> Direct testing process LCD indication<br> Digital LCD display with blue backlight<br> Portable and fashion design<br> Audible warning beyond preset limit<br> Sensor fault self checking<br> Battery saved design,low voltage indication<br> Digital LCD display<br> Specifications:<br> Sensor type: nano semi-conduct alcohol sensor<br> Working power: DC4.5V( 3 x AAA battery)<br> Undervoltage display: Vcc