HiFiBerry DAC+ 3.5mm Headphone Jack Version Dedicated 192kHz/24bit high-quality Burr-Brown DAC with external low-jitter clock for best sound quality. Hardware volume control. You can control the output volume using alsamixer or any application that supports ALSA mixer controls. Connects directly to the Raspberry Pi, no additional cables needed Compatible with Raspberry Pi models A+, B+, 2B and 3B Directly powered from the Raspberry Pi, no additional power supply