Specifications:

Circuit control: step-down circuit, constant current output
Dimensions: 8x20mm (W * L)
Power Supply: 3.0-4.5VDC
Output Current: 0-800mha constant current (Adjustable)
Application:
This is a power driver Circuit Board commonly used for 532nm/650nm/780nm/808nm/980nmnm Laser Diode!
Current adjusatble Widely industrial and LAB use!

Care Instruction:
Keep it in dry environment away from water or moisture!