Features: Easy-to-use: blowing to the top of the breathalyzer, then wait for the testing result displayed, really a simple method to test the alcohol concentration of your body. Non-contact testing is safer, no mouthpiece required, more economical. Detection Range: 0.000%~0.199%BAC, 0.000~1.990BAC, 0.000~0.995 mg/L, one button for unit switching. Orange Backlit Digital Display: convenient to read the test result at low light condition. Adopts Semiconductor Sensor: Features of high sensitivity, high accuracy and high reliability, the preheating time is less than 10 seconds, rapid response and recovery. Automatic Power-off, Power Saving: powered by 2pcs 1.5V AAA batteries(NOT included), with low voltage indicator when the battery voltage is too low. Compact Portable Size: measured size in 4.6*1.8*0.6 inches, and comes with lanyard for hanging the tester as you want, it is very convenient to take it with you. Specifications: Material: ABS Test Range: 0.000%~0.199%BAC, 0.000~1.990BAC, 0.000~0.995 mg/L Accuracy: 0.1 Reaction Time: 5s Preheating Time: 10s Working Environment: 5~40 Power Supply: 2 * 1.5V AAA battery (NOT included) Item Size: 116 * 45 * 15mm / 4.57 * 1.77 * 0.59in Item Weight: 45g / 1.59oz Package Weight: 120g / 4.23oz Package Size: 15 * 9.8 * 3.5cm / 5.91 * 3.86 * 1.37in Packing List: 1 * Breathalyzer 1 * Lanyard