Features: LCD display for easy reading. Answer us to deactivate Detection area: 0.00% - 0.19% BAC (0.0-1.9 g / l). Automatic shut-down Keychain size: Weighing, easy to make. Specification: size:112*68*22 Model: Digital Exhalation Alcohol Tester Alcohol Tester Material: ABS Alcohol tester detection range: 0.000%-0.199% BAC (0.00-1.99g / l) Alcohol tester function: three digit display Alcohol Tester Power Input: 2 * AAA Battery(not included) Alcohol tester mouthpiece: including 5 masks Digital display results: (%BAC / g / L) Alcohol Tester Certificate: CE, RoHS Package included: 1 * Alcohol Tester Notes: 1.Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2.Due to the manual measurement and different measurement methods, please allow 1-3cm deviation. Thanks!