Description: 100% brand new and high quality. Can be installed quickly and improve driving safety probability. Two options: five keys and ten keys. it can support all the common operation of the car. Installed without removing the original steering wheel can avoid damaging the steering wheel. Ultra-low power battery is available and at least can be used for one year. More comfortable touch feeling and Less space occupation. Button on the side can avoid the incorrect operation which caused by hitting the steering wheel. Install easily, just need to connect 4 lines before using. Application to most of the DVD navigation with direction control function. Specifications: Type: Controller Key Material: ABS+PC Color: Black Number of keys: 5 button,10-button Controller Key Size: 10 x 3.5 cm(L*W) Receiver Box Size: 5*5cm Package Include: 2* Controller Key (Battery Installed) 1 *Receiver Box 1 * Cable 2 set Screws 1 *manual Attention 1. In order to avoid to be interfered by some of navigation and get better reception, please straighten the receive antenna as close as possible to the steering wheel. 2. When pressing the button, please guarantee the time will more than 0.5 seconds, if not, the key may not be identified. 3. Please make sure the receivers positive electrode and negative electrode connect correctly, also insulating the terminals to avoid damaging other facilities.