This mobile and compact DAC adapter converts digital audio signals to analog audio and connects to any headphones via 3.5 mm headphone cable. With built-in EQ with 7.1 CH surround sound, you can control volume & mute by button and indicated by LED. Improves headphone audio dynamic effects with Hi-Fi sound performance. Perfect for gamers, Youtubers, music players, etc. With a sampling rate of 96 kHz at 24 bits and an outstanding noise ratio of 100 dB, this adapter delivers a breathtaking audio experience.