Welcome to the community of AIR+ users. With the SPORTident Active Card (SIAC) you have purchased a high-quality product that combines three functions. In AIR+ mode you punch contactlessly, with a distance between SIAC and SPORTident Control Station of up to 3 m, depending on the control station used. In classic punching mode the SIAC works like an SI-Card10 and is therefore a backup system in itself. Lastly, the SIAC can transmit its punches via short range radio to a receiving dongle or modem.