The 7443 White And Amber LED Dual Color Switchback Auto Bulbs are a practical and efficient lighting solution for your vehicle. With 28 LED emitter SMD chips on each LED, these bulbs provide bright and clear illumination. They operate on a 1-16 DC voltage, making them compatible with most vehicles. Sold as a pair, these bulbs feature a special IC built-in for a delay between amber and white, ensuring a smooth transition. Replacing most 7443 LED bulbs, these dual color switchback auto bulbs offer convenience and reliability for your automotive lighting needs.