Specification:Color: RedVoltage:DV 12VBulb Size:A Length:A 41.5mm、 Width:12mmABuilt-in Circuit for 12V DC Power InputEach bulb contains A 2 PCS Ultra White 5050A SMD LEDEach bulb contains Heat Sink to prevent OverheatBuilt-in CAN-bus controller、 no bulb out error、 no flickeringCross reference A parts#:A 211-2、 212-2、 214-2、 560、 569、 578The bulbs have the built in Can-bus load resistors and are made for A European cars、 such as A Mercedes-Benz、A BMW、A Porsche and A Audi etc..Festoon A 31mm-35mm:A 3021、A 3022、A 3175、A 6428、A 6430、A 6461、A DE3021、A DE3022、A DE3175Festoon A 36mm-39mm:A 3423、A 3425、A 6411、A 6418、A 6423、A 6461、A DE3425Festoon A 40mm-44mm:211、A 211-2、A 212、A 212-2、A 214-2、A 569、A 578、A 6413、A 6429、A 12844、A DE4410Note:1.Easy installation、 A just plug & play. All you need to remove the lamp covers with a small flat screwdriver and direct replace the stock lamps with LED lamps.A2.LED lamp has "+" and "-" terminals、 A if the LED does not light up、 just simply A flip it 180A A degrees to reverse the polarity of the LED bulbs.Package Includes:6x Ultra Red 4-SMD Interior Lights Bulbs 42MM Festoon