Using a bluetooth connection, the Forumslader can be used as a speedometer as well as an altimeter to measure your speed and altitude. It has a high-quality power supply and an easy to use interface to access both operating and internal data. You may connect additional sensors as well, such as an air pressure sensor (on the circuit) or a thermosensor (external or on the circuit). The following data can be displayed, evaluated and saved with a connection to your smartphone: - current speed - c