★【SAVES MONEY AND TIME】The KW850 car computer reader is a professional vehicle diagnostic tool for car owners to quickly read and erase DTC (engine fault codes) as well as a battery tester. A look-up library with over 8, 000 built-in generic code definitions allows you to accurately identify the cause of your CHECK ENGINE and perhaps fix it without going to see your dealer. It also assists you in easily passing annual emissions tests and SMOG CHECK. | ★【NOT ONLY TURN OFF THE CHECK ENGINE LIGHT 】Unlike other cheap car diagnostic scanners, KW850 OBDII code reader covers full OBDII/ EOBD diagnostic functions for engine system. O2 sensor test, EVAP systems test, and on-board monitoring test give you full control of your vehicle's running status, while a graphical and numeric live data stream display will help you to find out the faulty sensor readings. (Please be noticed: this function is for ENGINE System only). | ★【UNIVERSAL COMPATIBILITY AND EASY TO USE 】Works on most 1996 US-based, 2003 EU-Based and Asian (OBDII & CAN) domestic and imported vehicles, including passenger cars, SUVs, light trucks, etc. Supports all OBDII protocols. Simply plug into the OBD II port on your car, turn the ignition on and you are ready to go. No battery or complicated apps install needed. | ★【BEST IN THE MARKET】KW850 code reader car diagnostic tool is coming with the user friendly diagnostic interface and optimized software algorithm, it makes diagnosis 2-3 times faster than other OBD2 scanners. Featuring 2. 8'' LCD color screen and graphical real time sensor analysis, may help you fast identify faulty readings in seconds. Extra-long (4. 5') diagnostic cable coming in the package, allows you freely diagnose your cars even outside of vehicles. | ★【WHAT YOU GET】KONNWEI KW850 OBDII check engine light code reader offers free storage case, life-time FREE software update service to fix the latest bugs or add newly features which makes it compatible to more vehicles in future (Please note: it CAN NOT be updated on an MAC PC). With a worry-free 36-month and professional technician staying behind, 7*24 at your service!