DDHifi TC35 Pro DAC. Very compact, the TC35 Pro connects to usb-c port with a 3.5mm headphone output. It uses a high end ESS 9281ac PRO dac chip to decode high res files and MQA files, from services like Tidal.
Plug in your headphone first, then plug in the TC35 PRO - the auto impedance detactor will determine the impedance of the earphone or headphone and adjust into low or high gain automatically.
Great way to get better audio quality from an ipad, phone or computer.