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This LM2596 DC-DC buck converter is a high-efficiency step-down voltage regulator module. It accepts 4V to 40V wide input and provides continuously adjustable output from 1.25V to 37V. The clear LED voltmeter offers real-time voltage monitoring, helping you adjust the voltage quickly and accurately. Adopting high-quality components and excellent heat dissipation design, this module runs stably with low heat. Multiple safety protection functions effectively avoid circuit damage. Suitable for electronic DIY, battery power conversion, equipment power supply modification and more. 6 pieces are included to meet your bulk replacement and project needs.