Sell Automobile Fuel-saving Device, Fuel-saving Artifact, Boost Power, Refit Booster, Reduce Fuel Consump best price

[Precautions]: 1. This product must be plugged into the cigarette lighter before the car is started. Please do not plug or unplug this product while the car is driving to avoid circuit disturbance. Only when the engine is stopped or not working, can this product be plugged or unplugged. 2. The fuel economizer can't take effect immediately, it takes half a month to a month to a month to have obvious results! 3. The fuel-saving effect is related to driving habits, vehicle conditions, and road conditions. If there is no obvious effect after a period of use, please check whether the car battery is aging, whether the cigarette lighter socket is severely worn, and whether the power system is severely carbonized.