Features: This is a portable LCD digital display alcohol tester with high sensitivity. Come with five mouthpieces, mouthpieces can be installed on both sides of the tester. Advanced NM semiconductor alcohol sensor and with sensor Fault Self checking function. Quick response and recovery, a simple method to analyze the concentration of alcohol quickly. AI microcomputer control, SMD assembling technique, stable performance. Small in size and light in weight, come with storage bag, portable to carry. Digital LCD display with light blue backlight, shows clear results both in days and nights Powered by 3pcs AAA battery (Not Included), low power consumption and long lasting. Specification: Condition: 100% Brand New Material: ABS Color: Black Voltage: 4.5V Resolution: 0.01 Response time: within 5s Warm-up time: within 15s Recovery time: 30s Power supply: 3 * AAA battery (Not Included) Package List: 1 * Alcohol Tester (Batteries are Not Included) 5 * Mouthpiece 1 * Manual 1 * Storage Bag