Auto Steering Wheel Controller 46mmx12mm Universal Cars Steering Wheel GPS Wireless Button Key Volume Remote Control Tools Details: * new and high quality *Built-in replaceable button battery. *Support 7-Key function customize and background light. *Support all function such as(Vol+/-,Mode, phone,Pre/Next etc.) Specification: *Type:Car Steering Wheel Key Volume Remote Control *Condition: New *Colour: Black *Material: ABS+PC *Size: Diameter 46mm*12mm *Compatible: Instructions: 1 Remove the link between the car and the junction box red power cord black ground wire white square control line 2 Open the settings, find the steering wheel learning interface, click the corresponding in the picture, and press the button corresponding to the controller 3 Turn on the player after learning the function and start your wireless control tour Package Contents: 1*steering wheel controller _x005f_x000D_ _x005f_x000D_