Universal Wireless Car Steel Ring Wheel Button Remote Car Stereo DVD GPS Control

Feature:1. With 7 function keys to be set, meet all your needs on the common functions in a car.2. The functions can be kept forever on the controller without being removed deliberately.3. All the functions are easy to be set on the controller when you enter the key learning mode in the factory setup menu of your head unit.4. Being flexibly installed along the steering wheel as you like, this controller is easy to use and helpful to keep safety for your driving.5. This controller is universal, you don't need to remove the original steering wheel control to make it work.6. Suitable for all head units which come with the steering wheel control wire and can support steering wheel control.7. Customize your control with this multifunctional wireless steering wheel controller which is universal for all cars.It provides control of ultimate precision and accuracy to ensure your safety and bring you the greatest convenience during the driving.8. Firstly 3 wires of the receiver should be connect