LM317 LM337 Double AC-DC Preamp Amplifier Regulated Power Supply Bare PCB Board
LM317/337 Double AC-DC Preamp Amplifier Adjustable. 1pcs x LM317/337 Adjustable Regulated Power PCB Board. This is Bare PCB, not contains any other electric components. 【PCB Size】: 100mm x 55mm. 【Output DC】: 1.25-12.2V.