Color: Blue. Voltage: 12V Size:1.72 inch(42mm/41mm)Fits part numbers: 569 560 576， 578， 211-2， 212-2， 214-2 etc. Festoon DomeUsed for Car Interior Map Lights ， Dome Lights， License Plate Lights ，Cargo Area Lights， Side Door Courtesy Light，Trunk Lights etcPackage Content: 4 x Blue Canbus Car Festoon Dome LightNotice:All LED bulbs have to be plugged in a certain way，it has Positive and negative， so if they don't work at first， quickly take them out， turn them around 180 degree， and put them back in again.1) Ultra bright and durable LED/SMD bulbs2) 50，000 working hours，Extremely long lasting life3) Easy install plug and play4) This 4-SMD Error Free LED bulb will replace most stock 39mm to 42mm festoon bulb such as 6411 578 211-2 212-2 or 214-2 bulb.5) Canbus type LED are designed to work with vehicles with Canbus type systems such as Dodge/Jeep/Chrysler where normal LED bulbs may not work. They prevent flickering and other canbus related issues on most vehicles6) Please note: These light bulbs are slightly wider than original stock bulbs， please make sure your car's housing having enough room to fit them in. Please refer to Product Features for size reference