The product is a genuine BMW 1 Series E87 E81 E87 charging port cigarette lighter, with manufacturer part numbers 6949439 and 6904008. It is an original OE product from BMW, suitable for various BMW models. The reference OE/OEM numbers for this product are 51476949439, 6949439, 61346904008, and 6904008, ensuring compatibility and quality for customers looking to replace or upgrade their car's charging port cigarette lighter.