Professional hardware volume control. With the newly designed volume button you may adjust the volume smoothly by 32 scales, enhance the listening experience. Inspired by the volume control button on modern smartphones, the #34;+ #34; and #34;- #34; buttons are not visible on the outside as they are combined in a slim and elegant button. 4.4MM balance output. The combination of the dual CS43131 Dac chips through the 4.4 mm Balanced headphone connector will bring up to 175mw power to your high impedance headphone, allows you to use your beloved headphones anywhere, anytime. 8 Core silver plated OCC copper. The adopted 4 core 6N OCC copper cable provides extremely high signal transmission for better sound quality. Multiple systems support. Support multiple systems via the Type-C ports: Laptops/ PC/ IPAD PROS, also with the USB converter in the kit it can be used for both Mac and Windows systems. Technical Specification : DAC : DUAL CS43131 SNR : 130dB THD + N : 115dB Output level : 4VRMS Output power : 175mW / 32ohm Frequency : 0-40KHZ / + - 0.5 DB Crosstalk : -27dB Support : 32Bit PCM / 384kHz DSD256 (native) DSD128 (DOP) Support : HW VOLUME CONTROL Support : PC MAC and Android, Compatible with W7, W8, W10 and ASIO driver