Includes one (1) pocket alcohol breathalyzer for iPhone 4 (30-pin) and set of instructions. Caution will display at: 0.02% BAC (or 0.2g/l) to 0.05% BAC (or 0.5g/l). 0.05% BAC (or 0.5g/l) to 0.08% BAC (or 0.8g/l). Danger will display at: Over and EQUAL 0.05% BAC (0.5g/l). Over and EQUAL 0.08% BAC (0.8g/l). iPhone, iPad, iPod NOT included. Please note that this is not recognized as a legal device in lieu of the law enforcement's more sophisticated testing devices.