Specification: 1) Models: 3156/3157 S25-42SMD2) High quality3) Use for the car, truck and so on; 4) It is the brake light and tail light5) Emitting colors: Red, yellow, blue, green, white, amber6) Lamp Socket: 3156-31577) Available Voltage: 12VDC/24VDC. Usage: Turing Light, Brake Light. (Different Socket have different usage)