FitmenFitment: Compatible with 9005/9006/H1/H3/H7/H11 Solve Automotive LED turn signals,LED Headlights, LED brake lights, LED fog lights and otherlights easily extinguished after a malfunction or other problems. Stop flickering and cancels CANBUS error warmings.Solves flickering issuesGreat for low voltage vehicle-Cancels headlight flickering. Work with All After Market LED Headlight Kits:9005/9006/H1/H3/H4/H7/ H11If only the single-sided LED flashes, you can buy 1piece. No need to buy 2pieceSpecifications: SKU: A140-50w Condition: 100% Brand New Voltage:DC12V Power: 6 Ohm, 50W Usage:Head Light,fog light Package:1pairWhy one or two lights cannot work normally (flicker/blink) after installation?Please help us do a test with an external 12V or 24V power supply. Leaving the lamp out of the car, and then put them in an external charger to see whether the lamp can work well or not.If the lamps can work well out of the car, it means that your car needs the canbus.What is canbus?Canbus can solve the problems caused by low current draw when use LED bulb upgrade halogen bulb.Perfect solution for detect the LED headlight failure/bulb rejection, hyper flashing, and no flashing or burnt out bulb indications etc.Prevent OBC warning error code, canbus error on specific vehicles.But not all the canbus can decode all the car. The canbus only can decode 99% car on the market. Hope you can understand that.How to know if the car needs canbus?There are two way to find out the answer.1). You can call the auto shop where you buy this car from, and ask if your car has canbus system. If yes, then you need canbus.2). When you receive the lamps, if it cannot work normally, please do a test with an external 12V or 24V power supply. Please leave the lamp out of the car, and then put them in an external charger to see whether the lamp can work well or not. If the lamps can work well out of the car, it means that your car need the canbus.***NOTE***:Please be aware the LED load resistor will be very hot and work in high temperature; Do Not mount on plastic or material with low heat resistanc