Features： 1、An instrument that analyzes the concentration of alcohol in the blood anytime and anywhere 2、Non-contact use, no need to accompany breathing mouth, more convenient to use 3、With key chain design, small size, easy to carry 4、The breath alcohol tester uses advanced semiconductor alcohol sensor to quickly and accurately detect the breath of alcohol 5、With battery saving design and low voltage indication 6、The test value is directly displayed on the LCD, and the reading is easy and simple. 7、Audio and visible warnings exceed preset limits Specification： Item Type: HT-611 Digital Alcohol Tester Detection Range: 0.000-0.20% bac & 0.0 -1.9 g / l Accuracy: 0.05% + /--10% bac Pre-set Limit: 0.05% alcohol content Operating Time: Warm up 15-30s Response Time: <5s Automatic Shutdown: About 1 minute Battery: 1.5V AAAx2 (not included) Size: Approx. 50 x 105mm / 2 x 4.1in Package List： 1 x HT-611 Digital Alcohol Tester 1 x Nylon Rope 1 x User Manual