switching DC Power Supply is designed to use household AC power source to power equipments that required DC power. converts standard household power 100-240V AC to 12-18V DC power and can supply up to 30 amperes of continuous power. Features: Two DC power outputs, up to 30 amperes. Output voltage adjustable 12-18V. Large LCD indicates voltage and current amperes output. Two USB ports, 5 volts, 1000mA total for MP3 player, mobile phone and digital cameras. Smart cooling fan. Over temperature protection. Over loading protection. Short circuit protection. Specifications: Voltage: 100-240V AC Plug: EU/UK/US (optional) Input AC Frequency: 50-60Hz Output Voltage: 12-18V DC ±0.5V Output Current: 30A±1A Current Overload Protection: ≤31A 500MS Input Fuse: 10A Fuse Output Voltage Ripple: 0.98 Over Temperature Protection: <65℃ Cooling Method: Cooling Fan Operating Temperature: 0-40℃ Operating Humidity: 0-90% LCD Display: Voltage Precision ±0.3V Current Precision ±0.3A Dimensions: 218 * 139 * 59.5mm / 8.6 * 5.5 * 2.3in Weight: 1578g / 3.5lb Package information: Package size: 33.5 * 19 * 10cm / 13.2 * 7.5 * 3.9in Package weight: 1929g / 4.3lb General gift box Package list:(1 x KG-200013-01) 1 * 30A power supply 1 * Power cable 1 * English user manual