?Long life and extra low reducing brightness. No need to change bulbs frequently. ?Upgrade Advantage: Built-in intelligent IC driver for better performance, stable input current protects the circuit, Ensure the secure temperature range and consistent brightness out to reach a long LED bulb life up to 50,000 hours. ?Important Attention?Polarity Sensitive: If the bulb is not lit after the installation, please simply rotate the bulb 180°and re-install it. Please check your original bulb size and socket type before purchasing to ensure that our 31mm led bulbs can be used in your car. ?Product Features: The 3175 led bulb compatible with DE3175, DE3021, DE3023, 3021, 3022, 3175, 6428, 6430, 7065 etc. Voltage: 12 V DC, Color: 6000 K Xenon White, 0.64’’ in width, 1.22’’ in length.