Features: Aluminum alloy shell: precisions shell, metal wire drawing, highend, beautiful. New CM6631A: Better performances and higher quality. External Decoders: Supports Coaxials SPDIF output. Supports I2S output. Compatibility: Supports Box. for PC computers WinXP/7/8/10. Supports asynchronous 24BIT192K output and can be used to upgrades external DACs. for WINXP, WIN7, WIN8, 32BIT, and 64BIT systems. Support other source outputs. Specifications: Material: Aluminum alloy Size: 10.7x7cm/4.21x2.76inch Color: White, Black（optional） Style: Standard version, high-end version（optional） Package Includes: 1PC Digital Decoders note: Please allow 1-3cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the picture may not reflect the actual of the item.