Two detection modes: Accurate mode 1 to meet the needs of different occasions - a blowpipe needs to be installed for more accurate detection (5 tubes are included). Quick check 1 - no blowpipe required, suitable for multiple people, quick check whether there is alcohol or not Smart chip, high-precision sensor Accurate numerical values, high-definition large-screen display Light and compact, just enough to hold with one hand Colour:Photo Color Material:ABS Package Contents: 1 x Tester 1 x Charging cable 5 x blowpipe 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.