This laser diode module emits a small beam of red light. The focus can not be adjusted. It is designed for 5V operation, but will work OK from 4.5 (3 batteries). Red wire = positive, black wire = negative. I have no manufacturer data, and I do not know whether this module has been used or what the remaining life time will be. My supplier does not state the output power. Be careful with this item!
This is a surplus product. It was obtained from a surplus store, from an inventory or from any other secondary source. You can expect this product to be in good working condition, but it can show signs of being handled, shipped, repackaged etc. The supply of a surplus article can suddenly run out, or the price can change. Get it while it is available.
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