Dear，Pls leave a massage to tell us what design (Color) do you want.thank you.

Material Type: plasticItem Height: 10 cmVoltage: 12vSpecial Features: ECU Chip TunningExternal Testing Certification: CEItem Length: 10 cmItem Weight: 0.1 kgService: Supply Professional technical supportUnit Type: pieceitroOBD2 : More Power / More TorqueNitroOBD2 is a Plug&Drive Ready device to function the increasing the performance of engine. NitroOBD2 is easy to install. Just plug it into the OBD2 connector of cars. NitroOBD2 fits all car from the year of 1996. It works based OBD2 protocols as remaping the Car's computer ECU. After driving 200 km road total， NitroOBD2 adjusts itself to the car， according to the drivers' habits and always keeps remaping the ECU to increase the performance of engine. What does NitroOBD2 make?According to your driving habits， NitroOBD2 makes new map in the car's computer ECU to increase the performance of your car. As you driving much more KM/Mile， it renews the map. Thus it keeps the vehicle's power and torque increasing.