Audioengine D1 Portable Desktop Headphone Amplifier and DAC

FEATURES: USB and optical audio inputs for all your sources, RCA line-output, precise front panel volume control, built with audiophile-quality components. Weighs 1 lb. HI-RES AUDIO: ESS ES9018 DAC, ES9601C headphone driver, and CT7601 USB audio bridge. WHATS INCLUDED: D1 DAC, USB cable, setup guide, microfiber product bag. AUDIOENGINE WARRANTY: US-based customer support and 3 year product warranty is included.