This Nilight and USB switch panel is installed on my electric workbench in an atypical application, but works great for controlling several other 12V DC devices I have. Voltmeter on the USB shows 12-14V. It shows 24.2 when I set it to 24V and the LEDs get bright as the voltage increases (not adjustable - no bandwidth limit). Aside from a few misspelled labels, the sheets provided look fun and are perfect for marine applications. Overall - Very happy with the quality of Nilight and would recommend this pack
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