ddHiFi USB DAC TC35B USB Type-c → 3.5mm Used to connect earphones to a smartphone without an earphone jack. Used for about six months, and stored in its box since then. Operation confirmed, no issues with sound. Please understand that this is a used item. There are small scratches on the main unit, so please check the images for the condition of the unit. Shipping will be via Yuu Yuu Mercari.