“Mirco iDSD Black Label is a transportable high-end audio product” says John H Darko.

“The iFi Micro iDSD will recharge a smartphone from its side-mounted Type A USB port. Perhaps this is how we might best think of iFi’s latest portable DAC/headphone amplifier: a smartphone charger that will also extract the very best performance from a nice pair of connected headphones.”
 
 
Thank you Johh H Darko for your awesome review!

http://www.digitalaudioreview.net/2017/05/transportable-high-end-audio-ifis-micro-idsd-black-label/