Steering wheel remote, perfect for music control. - Brand: PerGar - Model: Steering Wheel Remote - Features: Navigation, audio control switch - Size: Approximately 36mm in diameter, 9mm thick - Rechargeable ※ Installation Overview: Of the four wires coming from the control box (apparently it's best to be inside the console box with the navigation system), connect the black wire to ground, the red wire to ACC+, the yellow wire to steering SW1, and the gray wire to steering SW2. (Connect to the wiring of the navigation system, etc.) How about this for cars that don't have a steering wheel remote? It leads to safe driving. It can also be attached in an easy-to-reach place other than the steering wheel. It seems to last for several months on a single charge. I no longer need it because the steering wheel remote on my car was fixed. I opened the package, but it is uninstalled and unused. Thank you for looking.