This control is mainly useful as part of a radio control system. It transmits the information of a punch by a non Air+ 'card'/finger stick to a nearby SRR receiver. Since Air+ finger sticks aren't physically inserted, it does not transmit for those cards, but by programming this type of control as a beacon control, with Radio set to "Send Last Record", the Air+ itself will transmit the punch info to the nearby SRR receiver.
Manufacturer: SPORTident