I purchased this used item on Mercari in August 2021. I used it a few times, and then stored it at home. I checked the operation for selling, and it worked without any problems; I was able to play music from my smartphone and listen through headphones. A dedicated USB-C cable for this product is included. Please refer to the images. ----- The FiiO Q3 is a USB-C connected portable DAC/amplifier, equipped with bass boost and gain switching functions. - Brand: FiiO - Model: Q3 - Connection Terminal: USB-C - Functions: Bass boost, Gain switching - Color: Black - Country of Manufacture: China