2X Lm317 Lm337 Positive And Negative Dual Power Adjustable Power Supply Board Diy Kit 4714231691833

2X Lm317 Lm337 Positive And Negative Dual Power Adjustable Power Supply Board Diy Kit 4714231691833

Maximum Power Per Channel:10W color: Material: plastic + metal Package Contents: 2 * LM317 dual power amplifier board set

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