[Portable Car Fuel Saver] The small and portable fuel saver makes your engine last longer and allows you and your family to enjoy a more environmentally friendly trip. [Easy to Use] Just insert this car fuel saver into the OBD2 connector of the car, and turn the ignition on for 30 seconds. and turn on the engine. [Efficient Fuel Saving] This auto fuel saver is efficient and can save gasoline. Environmental protection and low emissions to the economy.[Wide Applicable] This car fuel saver is suitable for most car models. Very easy to use, you only need 1 minute to read the instruction. [Economy] Energy prices are getting higher and higher, and the use of fuel-saving treasures can effectively reduce driving costs.Detailed description: Product Name: Car Fuel Savers Key Features: Economy: Energy prices are getting higher and higher, and the use of fuel-saving treasures can effectively reduce driving costs. Wide Applicable: This fuel saver is suitable for most car models. Environmental Protection: Low emissions to the economy. How to Use: Plug the fuel saver into the OBD2 connector of the car. and turn the ignition on for 30 seconds. and turn on the engine. Easy to Use: Very easy to use, you only need 1 minute to read the instruction.