... to carry Introduction This product is a alcohol tester designed for iPod touch5,iPhone5,iPad4,iPad mini, it's small, exquisite ... tester, and blow to air hole and exhale into sensor for 3 to 5 seconds , after finishing Countdown ,display screen ... product 7.Do not drunk driving for the safety of yourself and others pls. Digital Breath Alcohol Tester with red back light, portalble safety for driver