3 step with colored LED indication:
--safety: under 0. 02% bac (0. 10mg / l brac) -green
--caution: over 0. 02% bac (0. 10mg / l brac) -yellow
--danger: over 0. 05% bac (0. 25mg / l brac) -yellow and red audible alert quick response and resume clock with 12 / 24 format alarm count down & count up timer keep the deadline of your packing
clock use 1*ag 13 battery (included) alcohol tester use 2*"aaa" alkaline batteries (not included) unit size: 91*31*17. 5mm
3 step with colored LED indication:
--safety: under 0. 02% bac (0. 10mg / l brac) -green
--cautio