Features: - Helps stabilize circuit voltage and reduce voltage fluctuations - Designed to support engine performance and efficiency - Easy installation: Plug directly into the vehicle’s 12V cigarette lighter socket - Compact and portable design Compatibility: Works with most vehicles equipped with a standard 12V cigarette lighter socket, including cars, trucks, and SUVs Note: For optimal performance, connect only to the vehicle’s 12V cigarette lighter socket—do not use with power inverters, USB adapters, or multi-port chargers Package Includes: 1 x Fuel Efficiency Device Material: ABS plastic and electronic components Dimensions: 8 × 11 × 2.5 cm Disclaimer: Color may vary slightly due to screen and lighting differences. Slight measurement variations (1–3 cm) may occur due to manual measurement.