Lights88 Red Laser Module Diode DOT Laser 635nm 5mw 5V Stage Light Driver Cable Diode 1PCS

I've only played with it a few minutes, here are my initial observations. Dot size is a bit big and not well collimated (dot size gets bigger quickly with distance). It does seem to be reasonably powerful. I have no way to measure the optical power, but it is far brighter than the 5mw diodes i have. As others have stated, the focus is glued and the leads are reversed. Red is negative, black is positive. At 5 volts it draws 390ma and gets warm quickly. I think this seems about right for 50mw. For continuous use it probably needs a heatsink. Physical size: Larger diameter is 12mm, smaller dia is 8.5mm. Overall length including pcb is 25mm. Connector is a 2.54mm JST-XH type. Qty 1 even though picture shows 2.

good laser output for the price. the beam is a little wider than lower power lasers, but this is ok, there are some artifacts in beam, from the reflection of brass lens is mounted to, but can be eliminated with a 2-3 mm pinhole, without much loss of power. also the inset shelf is 8mm, the size of additional lenses such as line lens.

Says it is Focusable. The Focus on the one I got was glued down so it could not be focused. Laser driver is just a resistor. Leads were reversed. Red was negative and Black was positive. It is bright. Will measure power tomorrow.

These are nice but may be too bright!Says 50mw but shipped 100mw. I even ordered twice and got 100mw each time.

Pros: hey it works. It's cheapCons: Leads reversed. Two pictured but only comes with one. 100mw stated in title but is only 50mw. I'd still doubt it reaches that number.

Not really bright enaugh, inverted polarity.