Perfect match for and easy installation. Stable characteristics, high reliability. This listing features a pair of 3157 high power brilliant 42SMD 3528 Dual Color LED bulbs. Switchback LED lights are also known as dual-color LED, which are dual-function LED bulbs or LED strips that stay lit as white in parking/position light mode and amber when the turn signals are used. These are specifically designed for front turn signal lights or daytime running lights. This kind of switchback LED will give you a nice HID-matching look when operating as the parking lights since they are amber when the turn signals are used. The bulb is white when parking lights are on, signals amber only when turn signals are activated, and returns to white once turn signal is deactivated. Product Specification Colour:black Material:Aluminum alloy Package Contents: 2 * White/Amber 3157 Turn Signal Parking Light Bulbs Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.