This Switching Power Supply 12V 20A 120W is suitable for LED lighting, lamp strips, lamps, light box modules, light emitting words. Security surveillance cameras, instrumentation, 3D printers, etc. Be sure to confirm the input and output voltage first, Factory default output voltage 110V. Technical Parameter Input: AC110V/220V 50/60Hz Output Voltage : DC 12V (Number+V x 2, -V x 2) Output Current: 20.8A max Output Wattage: 250W max Fix Screw Hole Diameter: 2.5mm (0.1inch) Working Storage temperature: -15 to 55degree Celsius Environmental humidity: 10-95% Material: Metal, Electronic Parts,Rugged heavy duty enclosure Safety Compliance: CCC/FCC/CE/RoHS Overload Voltage Protection Voltage consistency:There is no voltage fluctuations to speak of at power on, during transmit, receive, or at power off. 100% Full load burn-in Tested:Smart device surge protection for Short-circuit Protection, Over Temperature Protection. Low Temperature Rise,low output ripple, noise,Parallel/Redundancy Operation is possible. Note: 1.110V/220V must be selected by switch before using to avoid damaging. Please change the switch to 110V for USA. 2.The unit can work long hours at this current and good cooling environment. The actual output current depends on circuit loads. 3.Do not power the unit before wire connection and voltage adjustment, DO NOT let the unit work long hours over rated current! Work under 80% of rated currency. 4.Even with EMI/RFI filter built inside, still not suitable for a hamradio operator connecting with radio or wireless communication equipments. 5. High Voltage inside, do not remove the cover. Dust the switcher out every 2 or 3 months if necessary. 6. IN-DOOR USE ONLY! This Unit "DOES NOT" comes with installation instruction, wiring cable, on/off switch, or screws. Professional installation of qualified electrician is highly recommended.

AFTER-SALES GUARANTEE: 30-day Refund Guarantee with 1 Year Warranty. We are trying our best to create a pleasant shopping experience for buyers.If you have any questions about our project, we are here 24/7 to assist you. Widely used in: Wide input voltage range, steady and precise output voltage.Great power transformer for Led Lighting and CCTV Camera Security System, communications & home appliance electronic equipment etc. High Efficiency and Reliability: Smart device surge protection for Short-circuit Protection, Overload Protection, Over Voltage, Over Temperature Protection. Low Temperature Rise.★Voltage consistency:There is no voltage fluctuations to speak of at power on, during transmit, receive, or at power off.★Built-in EMI filter, low output ripple, noise, Rugged heavy duty enclosure, 100% Full load burn-in Tested. Parallel/Redundancy Operation is possible. AC 110V/220V Input Voltage: We have already adjusted the switcher to 110V/115V for our US customers, if you want to use AC220V,don't forget to adjust the switch to the 220V side before use.★AC 110V/220V.Wide voltage input adjusted automatically to SMPS Model (12V 1A-5A, 12W-60W). As for Model (12V 10A-60A 120W-600W), there is a voltage selector switch located on the side of the switcher is used to set the input voltage to the power supply to either 110V/115V or 220V/230V. Switch power supply convert AC 110V/220V to DC 12V 20A 250W: The default input voltage is 110V, Output voltage is adjustable 10% , Metal case with many holes makes heat dissipation more efficient.