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1This witch power supply convert AC to DC, widely used in the power adapter, Led lights strip, LED display, billboard, industrial equipment, etc. Features: Switch power supply, convert AC 110V/220V to DC 12V . Dual input voltage: AC 110V/220V. There is a switch, choose the proper voltage before use. Steady and precise output voltage. Short circuit protection, overload protection(105%?150%), over voltage protection(115%?135%). Widely used as the power adapter for Led strip, LED display, billboard, industrial equipment, etc. IN-DOOR USE ONLY! Specifications: Material: Metal case Input voltage: AC110/220V ±15% Input Frequency: 50/60Hz Input surge: Cold start 25A@115V AC 50A@230V AC Output voltage: DC 12V Output voltage adjustment range: ±10% Output current: 40A Current Range: 0?40A Output power: 480W Working temperature: -40~65 degree Celsius Storage Temperature: -20°C - +60°C Humidity: 20%~90%RH Non-Condensation Item size: 21.4 * 11.3 * 4.8cm / 7.9 * 3.9 * 1.9in Item weight: 830g / 1.83lb Package size: 22.0 * 11.7 * 5.2cm / 8.7 * 4.6 * 2.0in Package weight: 873g / 1.93lb Package List: 1 * Voltage Transformer