Bluetooth-compatible DAC with optical digital output and RCA output, operating on 5V DC. Purchased new and used for about 3 months as part of a car audio system. Functionality was confirmed before listing (Bluetooth connection, optical output, analog output). The main unit and accessories are all shown in the images. From the manufacturer's website: (Please confirm the contents based on the images.) - Brand: TSdrena - Bluetooth Function: Bluetooth compatible - Input Terminals: Optical digital output - Output Terminals: RCA output - Power: 5V DC input - Accessories: Instruction manual, cables - Storage Case: Comes with a dedicated storage bag No claims and no returns accepted.