I purchased this item here before and installed it in my vehicle! It has a good reverb effect, making drives enjoyable♪ I no longer need it due to a change in specifications, so I'm offering it to someone who needs it! An AUX cable is also included. I confirmed its operation right before removing it. Below is the product description from when I purchased it. ・Connect the power via the USB port on the back. It starts up at 5v. ※USB cable is not included. ・Connect the AUX port on the back of the unit to your navigation system, head unit, or home speakers using an AUX male-to-male cable. ・Connect the reverb unit and your playback device (iPhone, etc.) via Bluetooth to complete the setup. 【Bluetooth Model】 This unit only connects via Bluetooth. Please note that the reverb unit and playback device (iPhone, etc.) cannot be connected via a wired connection.