iFi Micro iDSD Black Label DAC and Headphone Amplifier/Preamp With MQA and DSD. Desk and Portable Use With Smartphones/DAPs/Tablets/Laptops, Via USB/SPDIF/Coaxial/Optical / 3.5 AUX/RCA (Standalone): Amazon.co.uk: Electronics & Photo
ifi micro iDSD Black Label Review – Gone, But Not Forgotten - Home Studio Basics
Amazon.com: iFi Nano iDSD Black Label Portable USB DAC and Headphone Amplifier - Upgrade Smartphones/Digital Audio Players/Tablets/Laptops : Electronics