Features: 1).Design patented. 2).Sensor: semiconductor sensor 3).Warm-up time within: 10 second. 4).Response time within: 5 second. 5).Operate temperature: 5 ~ 40oC 6).Detection Range: 0.00% ~ 0.19% BAC 7).3-Step test levels show on display with sounds according to alcohol concentration: Safety: under 0.02% BAC Caution: 0.02% to 0.05% BAC Danger: over 0.05% BAC 7).Quick results and Restores. 8).Automatic power-off function 9).Low-Battery warning Battery input: 3VDC(2 ?AAA alkaline batteries) not included Unit size: 105 x 40 x 20 mm Print size: 12 x 12mm