Breath alcohol tester 3test step with LED indication Safety:under 0.02%BAC(0.1mg/l BRAC) Caution: 0.02%~0.05% BAC (0.1~0.25 mg/l BRAC) Danger: over 0.05% BAC (0.25 mg/l BRAC) Quick response and resume Torch function Key chain Use 2 ?AAA alkaline batteries (not included) Unit燿imensions: 73 ?39 ?30 mm