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This is a high-quality “wall wart” AC to DC 6V 2,000mA Barrel Jack wall power supply manufactured specifically for SparkFun Electronics. These are switch mode power supplies, which means the output is regulated to 6V and the capable output current is much higher (2,000mA).
These wall adapters are perfect for supplying power to many single-board computers like the multitude of Arduino development boards or even our own RedBoard. Please note, this specific supply (6V/2A) is also FCC/CE certified, works with 100–240VAC inputs and has a center-positive 5.5 x 2.1mm barrel connector.
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