Features 1、Easy to install and remove, no complicated tools required, convenient for using. 2、Powered by built‑in battery with ultra low power consumption. The battery can be used for about 1‑2 years. 3、Suitable for most DVD navigation with direction control function on the market. 4、Universal controller, you don't need to remove the original steering wheel controller to use it. 5、Support 5 buttons and 10 buttons two choices to meet the common operation needs of the car. 6、Super touch design, small space occupation and side buttons will not cause wrong operation through the steering wheel. 7、Integrated curved design, perfectly compatible with a variety of automotive steering wheels, without adversely affecting the steering wheel cover. 8、Being flexibly installed along the steering wheel as you like, this controller is easy to use and helpful to keep safety for your driving. Specifications: Condition: Brand New Item Type: Steering Wheel Remote Control Material: ABS Color: Black Shape: Half Moon Controller Button Size(L x W x H): Approx. 10 x 4.4 x 3.5cm/3.9 x 1 .7 x 1.4in Receiver Box Size (L x W x H): Approx. 8.5 x 4cm/3.3 x 1.6in Battery: Built-in 2 x Button Battery (CR2032) Package List 2 x Controller 1 x Receiver Box 1 Pack of Screw and Nut