Compatible: This LED Car Indicator Light Bulb has four packs. The bulbs are very popular in the aftermarket for cars by giving off a super bright light, which acts as both a warning and an indicator. As you like, this LED Indicator Light Bulb is also great for trucks, boats and other general purpose vehicles. Happy shopping! Connection: The warning light is suitable for DC 12V voltage (red is positive and black is negative). Giving super bright light plays an important role in warnings and instructions. Multi-color optional, you can mix and match according to your favourite.Green, red, blue, yellow, white (optional). High-quality materials: High-quality chrome + metal shell material. High hardness, rust resistance, oxidation resistance, stable properties and high reliability. For years of continuous use, it is better to replace old and damaged gauges and use them well. It has a longer life. Easy Installation: The indicator light adopts environmental and energy saving, high quality LED chip. Easy to install and operate, can be used for a long time. Ideal to replace the old or worn ones. Bring you a brand new experience. Service: brand new high quality, if you have any questions about our products, please contact us, we will reply you within 24 hours. Help >> Need more help >> Contact us at the top of the page and select Chat Customer Service .