Removable air intake nozzle.Safe, hygienic and easy to carry,Made of PP food grade material Adopt precise gas flow design,Instrument level circuit design,Results in 3 seconds Operation steps and test results,Beep prompts, simple and clear Emergency LED lighting,Find in darkness Specifications: Name: Digital Display Alcohol Breath Tester Voltage:4.5V (v) power supply:3*AAA batteries (1.5V)(Not included) time:10 (s) reaction time:10 (s) Measuring range:0-200mg/100mL Colour:As Shown Material:ABS Package Contents: 1 * Tester 1 * English instruction manual 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.