Features: Output Power: 5mw Wavelength: 650nm Working Voltage: 2.5V-3.7V DC Operating Current: <50mA Working Temperature: +10 ℃~+40 ℃ Laser Shape: Dot/Line/Cross Line Lens Angle:120 Degrees Default(We also have 30,45,60 and 90 degrees line lens.Please leave us a message if you need other angles) Focusable: Yes Material and Color: Metal Lens: Plastic Dimensions: 12x35mm
Notes: 1.It is a 650nm 5mw focusable laser module with three caps:Dot line and cross.You can change the caps to get different effects: dot line and cross,which is shown in the main photo. 2.If you want to prolong the working time of this module, please add heatsink to this module. 3.Please keep the lens clean.
Package: 1 x 650nm 5mw Adjusted Red Lasers Diode Dot Line Cross Laser Module Heatsink & Driver In
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Laser is barely visible, you would have to use it in the dark which defeats the purpose. Tried exact, under and over required voltage level with no change. So cheap, not worth the effort to return. Look elsewhere for a better product.
I have a green 1mW level and it is far brighter than this red 5mW. So much weaker it makes me think this unit is defective. The line is not very tight.
When changing the lenses be aware that there is a spring that is used to put tension on the lens to hold the focus. The spring will easily fall out and get lost if you're not careful. Without the spring, there is little friction to hole the focus, the lens turns very freely. Even with the spring it does not take much effort to change the focus and I could imagine that any sort of vibration would change the focus over time. So use of thread lock may be in order depending upon your application.