Used in a studio. Sound output has been confirmed. Regarding the points to be confirmed in the photos, the mini-plug on the guitar side (transceiver) is slightly distorted (but doesn't wobble), so this will be reflected in the price. It is operating normally. 【Wireless Audio System】 The XIAOKOA U12D is a wireless audio amplification device for guitars and basses. It uses radio signals, allowing you to play freely while moving around. 【Easy Connection】 You can easily connect it to various instruments using the 6.35mm output jack. A USB cable is also included for convenient charging and connection. Japanese instruction manual included. - Brand: XIAOKOA - Model: U12D - Accessories: Wireless transmitter, wireless receiver, USB cable - Connection terminals: 6.35mm output jack - Instruction manual: Japanese instruction manual We are looking forward to purchases from those who understand that this is a used item. Shipping costs will be covered by us, and we will arrange for prompt shipping.