CD-SR70 STEERING WHEEL REMOTE FOR PIONEER HEAD UNIT OLD SCHOOL CAR AUDIO | eBay
Steering wheel controls - how to add them to your older car - YouTube
Pioneer CD-SR1 (cdsr1) Steering Wheel Remote Control for AVIC-Z1
Amazon.com: Universal Car DVD GPS Player Wireless Remote Controller, Steering Wheel Remote Control Button for Car Navigation DVD / 2 din Radio Steering Control : Electronics