Warranty information available here
The AJ-WM50 is the dual band, compact wireless module for P2HD and AG-DVX200 camera recorders.
The WM50 dual band (2.4GHz and 5GHz) makes for a more reliable, stable connection to a network in various environments yet its compact size enables it to fit in the wireless module compartment of the P2HD cameras. 2.4GHz offers strong connection through obstacles and compatible with many devices whereas 5GHz offers stability from radio wave interference (Microwave, Bluetooth, etc).
The update will be available free of charge on the Panasonic Service site between end of April and June (depending on model). Please check the Panasonic Service site for more details.