FOBO Tire Bluetooth 4.0 Theft Deterrent Android and iOS Compatible Tire Pressure Monitoring System with Car Unit and 4 Tire Sensors FOBO Tire is an advanced Tire Pressure Monitoring System (TPMS) using latest Bluetooth 4.0 that works directly with your Android and iOS device. With an intelligent In-Car monitoring unit that works on its own or simultaneously with your smart phone, FOBO Tire monitors up to 350 kPa(50 psi) and gives you an alert even in the absence of a smart phone. Even when your car engine is turned off, FOBO Tire works around the clock to make sure your tires are properly inflated. You can monitor up to 19 vehicles from your smartphone simultaneously through one App, which also has a do-it-yourself five minute set up instructions on screen. FOBO Tire is theft deterrent, which means that any stolen sensors cannot be reused on another vehicle. Each FOBO Tire is locked to a specific owner's FOBO cloud account. You will also be notified by the FOBO Tire app in the event any tire sensor is missing. Share with family and friends, allowing them to receive the information from your FOBO sensor. The more the merrier! Four tire sensors, one in-car unit, and batteries included which last up to two years and are easily replaceable (2xAA - In-Car unit & CR2032 - sensors).