... %BAC 4.Mouthpiece 5.Blue-colored backlight wine alcohol tester,digital alcohol tester,alcohol detector,breathalyzer,breath alcohol tester,portable alcohol tester,breathalyzer with different design Model NO.: AT ... . Blue-colored backlight 12. Low voltage indicator 13. Power input: 3V (3 x "AAA" alkaline battery, not included)14. Unit size ...