OBD2 Full Chip Tuning Box Compatible with Diesel Gasoline Cars ECU Optimization Features： 1、The NitroOBD2 is a plug‑and‑drive device for economical fuel consumption reduction and low emissions. 2、It is easy to install and plugs directly into the car OBD2 connector, and the ecoobd2 is suitable for all models starting in 1996. 3、NitroOBD2 can improve engine performance. 4、Its working principle is based on the OBD2 protocol to remap the car ECU. After driving for 200 km, NitroOBD2 adjusts the car according to the driver's driving habits, re‑maps the ECU to increase the performance of the engine and avoid unnecessary power loss. 5、Nitroobd2 discovers the hidden power of your car: up to 35% more power, up to 25% torque. Specification： NitroOBD2 Diesel: blue and red NitroOBD2 Gasoline: Green and Yellow Functions: low fuel consumption and low emissions Installation and calibration 1. Insert the car key. 2. Find your car OBD2 connector and insert nitroobd2. 3. this stage is more critical, to reverse the car key. (Do not start the car) 4. Press the nitroobd2 reset button for about 5 seconds. After releasing the button, wait for a while for about 30-54 seconds (nitroobd2 will communicate with the ECU to establish a connection) 5. Start the engine. 6. Nitrobd2 will recognize your car and your driving habits. After about 200 km / 150 mph, nitroobd2 will adjust itself to match your car's more fuel-efficient perfection. Package List： 1 x Full Chip Tuning Box 1 x English User Manual