... Test, DescriptionContentsModel No.:XHST2709Product:LED Breath Alcohol TesterSize71.5 x 35.5 x 24.5mmWeight15 grams including batteryHousingShock resistance, molded plasticSensorSemiconductor alcohol sensorResponse ... time( sensor purge)60 sec.Battery lifeOver 100 testsBattery3V 2 x AAA alkaline batteryCertificationCE & rohsAccuracy+/- 0.01 % BAC at cal. pointDetection ...