FiiO's BTA30 Pro, a Bluetooth receiver, transmitter, and USB DAC. I am selling it because I am changing equipment. 【Condition and Environment】 Usage period: Approximately 1 year Operation: Operation confirmed Environment: Non-smoking, no pets Included items: All included As a bonus, I will also include the older model "BTA30" I believe it is in a clean condition with no noticeable scratches, but please consider that it is a used item.