After the original bulbs are replaced, there will be errors in the dashboard, the lights flash or don't turn on, etc.,which are caused by the inconsistency of the current between the new bulb and the old one.The car's computer will judge this is a malfunction and will report an error. CANBUS-Ready - These HB4 Low Beam Halogen Replacement Bulb with decoder.Aluminum housing and forced cooling fan, two functions can achieve better heat dissipation effect. Easy to Dissipate - The aluminum alloy body of 9006 LED Headlight Bulbs with a high-speed turbocharged fan has been fully upgraded.Its brightness can ensure the driving safety.The energy consumption of the this H8 H9 LED Light bulb is only 1/20 of that of the halogen lamp. Features- These 9006 LED Headlight Bulbs Low Beam featured by high brightness & mini design, IP68 waterproof, quick installation, energy-saving and environmenr-friendly.Welcome to let us know if you have any concerns or questions, our customer service team is always here to satisfy all of you! We offer 12-month warranty and returnable service, please buy with confidence. WHAT YOU RECEIVE: 1 skull cap included in the package.It can be perfectly used in many activity occasions, such as hiking, running, fishing, sport climbing, cycling, skiing and more outdoor activities. WIDELY USE: Suitable for most people's head circumference and both perfect for men and women to wear.Benefits from the material, it's machine washable, please wash before your first use and after every time you wear to keep mask clean and hygienic. MACHINE WASHABLE: Unlike some masks in the market that is complicated to wear and wash, ours is much easier to wash when you're not wearing.And if you find it not warm enough to wear in winter, you can also put on an extra caps to make yourself warmer and put on a helmet when cycling. We have 4 colors for you to choose, of course, black is a classic color, gives you a stylish and fashionable look. CLASSIC DESIGN: Simple color and exquisite design, easy to go well with cloths.Lightweight and durable with high elastic function, provides you with a comfortable wearing experience in use. Features sweat absorbent performance and no irritating smell. HIGH-QUALITY MATERIAL: Made of premium thermostatic fabric material, breathable and soft feel.

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