... Introduction This product is a alcohol tester designed for iPod touch5,iPhone5,iPad4,iPad mini, it's ... then unlock iPhone , then press switch of tester for a long time till Tester alert short buzzing, ... blow to air hole and exhale into sensor for 3 to 5 seconds , after finishing Countdown ... drunk driving for the safety of yourself and others pls. alcohol tester with light FOR iphone5 safety for driver