Features: Functional car accessory designed to help stabilize circuit voltage, improve engine efficiency, enhance throttle response, and support smoother engine starts. Additional features: Helps reduce voltage fluctuations and supports consistent power delivery. Easy installation: Simply plug into the vehicle’s 12V cigarette lighter socket for immediate use. Practical car accessory: Compact and portable design for convenient use across various vehicles. Note: Actual color may vary slightly due to lighting conditions. A 1–3 cm measurement variance may occur due to manual measurement. Material: ABS plastic and electronic components. Size: 8 × 11 × 2.5 cm. Compatibility: Works with most vehicles equipped with a standard 12V cigarette lighter socket, including sedans, SUVs, and light trucks. Important: Must be plugged into the cigarette lighter socket only — not into AC power outlets or multi-port adapters. Package includes: 1 or 2 pcs Fuel Sync Gas Saver unit.