The Q15 features a new desktop mode that features a separate Type-C power connector. When connected to the power adapter, the Q15 is powered externally, bypassing the battery. In desktop mode, the FiiO Q15 with balanced output can output 1600mW in the enhanced over-ear headphone mode, which is more than enough to drive various IEMs and full-size headphones. The FiiO Q15 combines USB DAC, Bluetooth, coaxial decoding and other modes in one device, making it easier to connect different devices for different usage scenarios. The FiiO Q15 features AKM's latest DAC combination - the AK4191EQ+AK4499EX. In combination with the newly developed "DWA Routing Technology", the audio performance is significantly improved. The result is a detailed, natural and realistic sound. The Q15 is equipped with digital components at the same level as the FiiO Q7 and uses the ARM processor to realize USB/coaxial/Bluetooth decoding in a device that can process digital audio signals with low latency and high efficiency. The full-color IPS display makes it easy for you to view the current device status, such as current sample rate, volume, gain, and other information. An intuitive volume control helps you control the volume and easily navigate through the settings. FiiO engineers have implemented a "Phone Mode" switch to make the Q15 more suitable for use with phones. When you enable Phone Mode*, the Q15 will be powered by the built-in battery and will not consume the phone's battery. Thanks to the carefully designed internals, the FiiO Q15 also has a coaxial input. This allows the Q15 to be connected directly to digital streamers and CD players using normal coaxial cables.