Quality: Beam gets wide after few meters and its not strong laser but I didn't need a strong one. Ease of use: Just connect the wires and it works. Only needed a transistor to use it with Raspberry Pi. Very good price.
Pros: It does what it says. I prefered to read the reviews to try it, maybe it's better with the 100ohm resistor for protection, but without resistor the laser is very bright. Cons: None until now, I hope it lasts very long.
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