This bulb is compatible for both CK/SRCK and standard socket, non-polarity design. Best value in the market! Features Dual Brightness: The Dim mode is Tail lights or DRL, while the Bright mode is Brake/Turn Signal lights or Back Up Reverse lights. The bulb run in Bright mode when your bulb only function in one mode. High Brightness LED: 54SMD 3014 chipsets 3SMD 3030 chipsets. Working Voltage: 9-30V (fit 12V, 24V vehicles). Output Wattage: 3.8W/bulb (Low Power Consumption). Color: Xenon White 6000K. Waterproof: IP65. Service Life: Up to 30,000 Hours. Note: Load resistor or flash relay might be needed to prevent the hyper flash when replacement for Turn Signal Lights. IMPORTANT NOTICE! Please confirm the bulb base before placing an order. iBrightstar is a registered brand with Amazon. Please contact us if there is any questions or other requests! Set of 2 Bulbs 54SMD 3014 3SMD 3030 high brightness chips per bulb, Working Voltage 9v30v fit 12V, 24V vehicles. Fits 3056 3057 3057K 3057LL 3155 3157 3157K 3157NA 3157NAK 3157LL 3156NA 3156A 3156 3156K 3356 3357 3357K 3357KNA 3357LL 3457 3457NA 3457K 3457NAK 3757AK 3757ALL 4057 4057LL 4057K 4114 4114LL 4114K 4157 4157LL 4157K 4157NA 4157NAK 5702A 5702AK 5702AK etc. Easy installation, plug and play. Application Back Up Reverse Lights, Tail Brake Lights, Turn Signal Lights, Tail Lights, Parking Lights, Side Marker Lights, Daytime Running Lights etc. Load resistor or flash relay might be needed to prevent the hyper flash or system error. Advantage Nonpolarity design, more than 300 brighter than original halogen bulb, full Aluminum Housing with Projection lens for Maximum Light output and better heat distribution, built in Constant Current IC for Longer life span Low Power Consumption. Please double check owners manual or original bulb number to confirm before placing an order. Any other problem please feel free to contact us, we are always here to satisfy of you. New design launched in 2019, US Patent number USD908272S