What is a steering wheel adapter?

What are steering wheel adapters for?

Adapters designed to activate the factory controls (buttons) on the steering wheel in the case of the purchase of an aftermarket car radio of the brands Pioneer, JVC, Kenwood, Sony, Alpine, Blaupunkt, Panasonic, Clarion, Zenec, LG. The adapter is divided into two parts, namely the steering wheel control adapter (interface) for the given type of car and a separate connecting cable between the adapter and a specific brand of car radio such as Sony, Alpine, Kenwood, Panasonic, JVC, Pioneer, Blaupunkt, Clarion, LG, Zenec etc.