The ZEN DAC Air is a Hi-res DAC (Digital-to-Anologue Converter) and headphone amp. Elevates the sound quality of digital sources to a higher plane. Use as a headphone amp, or as a pure DAC with an amp and speakers. Connect to PC's, Macs, smartphones, tablets, game consoles and more via USB. Supports 32-bit/384kHz PCM, fully native DSD256 and MQA. Convenient desktop size, powered by USB or mains. Powerful amp drives all headphones/earphones with ease. PowerMatch and XBass controls - adjust to suit your headphones. High-performance circuitry delivers smooth, detailed, and dynamic sound.