Usage Tips: Features: Universal multifunctional car steering wheel control for key button for your car stereo. Provides control of ultimate precision and accuracy to ensure your safety and bring you the greatest convenience during the driving. Support to answer / end phone call and control the GPS navigation system. Fit for all DVD GPS Navigation System Player that has steering wheel study functions. Ergonomic design, can be fixed on all steering wheel, improve great operation convenience and safety for user. Simple and easy copy operation, high correct ratio for copy LED backlit for each botton, convenient to use at night drining Specifications: Size: app.7x3cm/2.76x1.18in Color: As pictures shown Quantity: 1 Pc Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1xController for Key 1xReceiver box 1xEnglish user manual 1xPackage box