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I thing the laser is IR

Is this lasers enough powerful for a visible beam in the air without any gas ? Are the 808 nm visible ? There's another choice but a "pulse" (?) laser there's also a 10W power for approximately 30 euro

then I hope that I can get a laser diode with 90mW of power for 10 euro :)

that's not fair .... ------------------ can I add lens or mod it ? I don't need power - just a beam

Yes, the support from one very famous website for laser sell said the same :) .. but that's a picture of a yellow laser 1mW that have a beam

Hello I have a red china laser with power of 1mW - it produces a bright red spot, but NO beam! All the lasers on the internet clips have beam... but not mine

Hehh very funny :)