1, wireless remote control, can answer the phone, can be added or assembled, you can switch navigation / music / DVR / radio and so on. 2, you can customize all the key functions to set their functions, 3, a total of 10 buttons to customize the installation function. 4, easy to install, free hands, improve driving safety, 5. Button backlight: blue note: 1. Two conditions are required to install the steering button: (1) Car radio needs to have a steering wheel learning interface (2) Car radio needs steering wheel control line 2.Installation Notes: If you do not understand how to install, please contact our customer service staff. We will send you a training video, thank you! Universal steering wheel controller for 2 din Android car DVD GPS navigation steering wheel radio remote control button black Item Type: Remote Controls Special Features: Car steering wheel remote Support 1: 2Din Android Support 2: 2Din radio Support 3: 2Din Car DVD GPS navigation Material Type: Wireless remote