The FSRK 3.1 includes the Freespace Sensor Module (FSM), the Freespace Remote Control Module (FRCM), the Hillcrest USB RF transceiver (RFT), and a CD with the Freespace Toolkit that lets users observe and evaluate the performance of Freespace motion control. The FSRK 3.1 and FSP160 are not recommended for new designs. If you are new to Freespace, please use our FSP200 family of processors and reference kits.