Parts List: 1Alcohol Tester 5Mouthpieces 1Manual Highlight [LCD Backlit Display] Our alcohol tester has red LCD backlit display for easy reading. It has small size of 110x42x20mm, lightweight and easy to carry. It comes with keychain. [High Precision] This digital breath alcohol analyzer has high quality and high precision, which can quick respond within 5 seconds and recovery on time. [With Sound Alarm] This product has sound alarm and energy-saving automatic shutdown function. It adopts semiconductor alcohol sensor and is powered by 2 AAA batteries (not include). [What You Get] The package includes 1 alcohol tester, 5 mouthpieces and 1 manual. The mouthpiece is easy to replace for health and convenience. [After-sales] If you have any questions, please get in touch with us, our service team will provide you with a professional and satisfactory service. Detailed Product Name: Alcohol Tester Material: ABS Color: Black Product size: 110x42x20mm Powered by 2 AAA batteries (did not include) 1. Digital display with red backlight 2. Digital alcohol tester with sound alarm 3. Test range: 0.00-1.99 BAC 4. Fast response time, recovery on time. 5. Energy-saving automatic shutdown function 6. Three LED displays display at the same time 7. After starting up, the countdown from 100 is displayed on the screen, which is the warm-up time 8. Automatically turn off the power, after displaying the result for about 17 seconds, the "off" symbol will appear 2 times Sensor: semiconductor alcohol sensor Warm up time: 20 seconds Response time: within 5 seconds Test range: 0.00-0.19% BAC Power supply: 2 AAA alkaline batteries (not included with this machine) Working temperature: 10-40 degrees Celsius