Advantage: You don`t need to charge the tracker when no power if connect this charge with your car. Specifications: Efficiency: 75% Size (mm): Triangle Power range: 5-18VA Ripple / Noise: <100mV Output voltage: 3-9V DC Input voltage: 12-24V DC Rated operating current: 0.1A-2.1A Applicable voltage range: 12-24V DC Working environment Humidity: 5% -95% Working environment temperature: -10 - +40 Electrical characteristics: overvoltage. Overcurrent. Short circuit protection Applicable products: audio and video, communications, lighting, IT category Package Includes: 1 x GPS Tracker Car Charger