The HiFiBerry DAC+ standard RCA is a high-resolution digital-to-analog converter for the Raspberry Pi Model A+/B+, 2B and 3B. This is a special sound card for the Raspberry Pi, that is optimized for one specific use case: the best audio playback quality. Dedicated 192kHz/24bit high-quality Burr-Brown DAC 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 No soldering Comes as a pre-fabricated kit. You just plug it onto the Raspberry Pi B+. Mounted in less than a minute. Compatible with Raspberry Pi model A+/B+/2/3 Directly powered from the Raspberry Pi, no additional power supply Ultra-low-noise voltage regulator for optimal audio performance Integrated EEPROM for automatic configuration The board is conform to the Raspberry Pi hardware-attached-on-top (HAT) specification. Comes with all components required to mount it. We include 4 M2.5x12mm spacers to fix the board onto the Raspberry Pi.