HZC-DFR50, HZC-DFR50M and HZC-DFR50W are the software licenses on the HDC-5500, HDC-3500 and HDC-P50 for shooting Dual Frame Rate 2x slow motion.
The HZC-DFR50 can be permanently used.
The HZC-DFR50M can be used for 30 days.
The HZC-DFR50W can be used for 7 days.