iFi audio ZEN CAN Signature MZ99 (ZEN CAN Signature Mezekyuukyuu) 4.4mm balanced input/output headphone/preamplifier iPower II 5V included [Genuine Japanese product] Comment: It has both DIGITALOUT and INPUT of coaxial. As of March 2022, I would recommend the iFi audio ZEN CAN Signature MZ99 over buying the GUSTARED X16, but in the future, there may be more and more cheap and good products in the future, such as full digital amplifiers and speakers with both MQA and full digital amplifiers We are looking forward to your continued patronage.