Each 7440 or 7443 LED bulb equips with 40 SMD 1210 LED light chipEmit 6000K xenon White color temp. light, long lasting lifeEasy Plug & Play installation; Quick instant Start-Up timeShock & vibration Resistant and instant on/off response timeIt works at ~12VPlease try to reverse the polarity of the LED light if you found that the LED light is not working properly after installation***NOTE*** If you are using these LED light bulbs to replace the Turn Signal blinker light, Tail Brake Stop light, Parking/Daytime Running light DRL; depending on your vehicle electric circuit, you may need to add a pair of load resistors to prevent hyper/error flashing or malfunction problemCross Reference for this 7440 or 7443 LED light bulb:7440 (single filament): 992 992A T207443 (dual filament): 7441 7444