Colorful Colorfly C3 - Rockchip RK27xx based player.
Internal components:

• SoC: C4 MASTER, must be Rockchip RK27xx
• DAC: TI PCM1770
• NAND: Intel 29F32G08AAMDB [JS29F32G08(?)]
• RAM: 16Mb Elixir N2SV12816FS-6K, Nanya NT5SV8M16FS-6K
• Touch: ATLab ATA5088 Digital Contact Controller
• PMU: PowTech PT1502
• LCD: unknw

Firmware updates Encrypted image CFFWPKG.ISO, need to disassemble BASE.RKW. Raw backup from hidden system partition Colorfly С3 and unencrypted update.img for Colorfly CK4\CK4+ also available.
NOTE: tag file name CFCONF.SYS
http://www.colorfly.net/ch/download.html
http://www.colorfly.net/ch/download.html
http://www.colorfly.net/down.html
http://www.colorfly.eu/download.html

Forum Discussions:
http://forums.rockbox.org/index.php/topic,43005.0.html

Tools:
Rockchip RK27Upgrade for Image 2.27

Wiki:
http://www.rockbox.org/wiki/Rockchip27xx
http://www.rockbox.org/wiki/RockChip
http://www.rockbox.org/wiki/HifimanPort

External Links:
Review http://www.expreview.com/18217-all.html