●【Fit Size】7440 7440A 7440AL 7440NA 7440LL 7440ST 7441 W21W WY21W LED especially for Rear Turn Signal Light. ●【300% Brightness】7440 LEDs Built with 24pcs 3030 SMD LED chips. High power 24W, 1600LM per bulb for amber Rear Turn Signal light 1600LM, ensure safety on the way home. ●【Canbus Ready】 This 7440 bulb Prevent 95% incompatible Issue, build-in canbus system,will not hyper flash, no extra resistors need. ●【Plug and Play】They are ALL-IN-ONE LED designed to directly replace the factory halogen lamp. ●【First Safty Protection】Load MINI fuses to protect the bulbs and vehicle against the instantaneous high current, safer installation and use. ●【Second Safty Protection】Build-in Intelligent Temperature Control (ITC) protect bulbs against excessive current and overheating, ensure longer lifespan. ●【Note】1. If the LED does not light up after inserting, simply flip the direction and reinstall. 2. Since these bulbs built-in Intelligent Temperature Control, if you use for a long time may happen hyper flash (a few vehicles maybe 2-5 minutes, it depends on vehicle and temperature) , please turn off and cool 1-2 minutes, they will work properly again.