Pocket HIFI for Colorfly - This equipment is a Mp3 player for high quality music.It was made in Zinc alloy and Wood. Regius walnut: black walnut in North America The outer casing material of the Pocket HIFI C4 player is made of the black walnut in North America. The black walnut had been called regius walnut. The pleasant vignette is formed by the clear, smooth glossy and wavelike grains and the clear annual ring. It provides each music fan a unique player. Precision: it is manufactured manually. Wan¡¯s team adopted to process the wood by the CNC numerically-controlled machine in the constant temperature and humidity workshop. The design and the special curve on the wood were engraved manually.