HIGH PRECISION PORTABLE BREATHALYZER: Adopta of high-precision, high-reliability sensors THE MEASUREMENTIS FASTACCURATE AND STABLE:Government and enterprises for the special test of overnight wine WIDELY USED IN MANY FIELDS:Compact and easy to carry DESIGNED WITH PRECISE FLOW RATE:Meter level circuit design results in 3 seconds,The latest generation of high-precision sensors , compact and portable: stylish appearance and sturdy casing Colour:Black Material:ABS Power Supply: 3 x AAA batteries(Not included batteries) Package Contents: 1 * H33 Alcohol Tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.