You will need to purchase Microsoft Windows CE 6.0 labels from an authorized Chip PC Reseller (http://www.chippc.com/howtobuy/find-store/) prior to upgrading your devices.
THIS IS CUSTOMERS' SOLE RESPONSIBILITY TO PAY THE REQUIRED FEES AND HAVE THE UPDATED MICROSOFT LABELS ATTACHED TO THE UPGRADED DEVICES. UPGRADING DEVICES THAT ARE NOT PROPERLY LICENSED OR ARE NOT IN THE SUPPORTED MODELS LIST, WILL VOID DEVICE WARRANTY
Upgrading to Windows CE 6.0 R2 is applicable only for models Xtreme PC NG64xx/65xx/66xx and Jack PC EFI6800/6900 with Windows CE 4.2.