Simply hook them up correctly to a battery (9 volt - 12 volt, I have been using a basic 9 volt), and they work great. Lots of them for a small price. Easy to use.
EDGELEC 180Pcs 5Mm 9 Colors X 20Pcs Assorted LED Lights Flat Lens 1.14In Long Lead + 300 Resistors (DC 6-12V) Bulb Lamps Light Emitting Diode Kit
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