This is a Laser Module Focus Adjustable. Just power it, and you can adjust the focal length as you like. Do not underestimate it, it can ignite a piece of paper card or wood. 

Specifications:

Output band visible light
Operating current 210mA
Supply voltage 12V
Optical section Focusing lens
Spot pattern Point shape
Working temperature ± 50 ℃ Material Aluminum
Working life of 8000 hours
Wavelength 450 nm
Output power 1000mW
Dimensions 33mm * 65mm (adjustable focus)

Safety: 

Please never point the laser beam to Human or animal's eyes.

Please never point the laser beam to aircraft in the sky.

Please wear laser goggles for any in room research or experiment.

Please keep laser far from under 18 years old Children.