... Alcohol Breath Tester For iphone 5 2. Mini size alcohol tester 3. LCD digital display breathalyzer Breath Alcohol Tester For iPhone 5 Product Specifications: ... product for iPhone , and unlock iPhone, then press the switch of the tester for 2-3 seconds, at the same time LCD screen ... seconds, please blow to air hole and exhale into sensor for 3 to 5 seconds, after finishing Countdown, display screen ...