The BLE Tire Gauge is an iPhone 5 / iPhone 4s enabled digital tire gauge App for cars and bicycles, that provides selectable measurement units such as PSI, BAR, kPa, and kg/cm2 for our Tire Pressure Meter. The BLE Tire Gauge App will display the tire pressure information (in relation to a preset “ideal” pressure level, and will alert when the actual tire pressure is out of the range)