digital alcohol tester, breath alcohol tester, keychain alcohol tester 1. Warm-up time: Within 10 seconds digital alcohol tester1. Sensor: Semiconductor alcohol sensor2. Warm-up ... % - 0.19% BAC / 0.0- 1.9 mg/l6 Digital display results (% BAC / mg/l)7. Quick response and resume8 ... )9. Power input: Use 2xAAA alkaline batteries (not included) digital alcohol tester, breath alcohol tester, keychain alcohol ...