The Quarton Mini Dot Size Red Laser Module Vlm-635-63-Lpo-200 Is A 20 Cm Laser APPLICATIONS: Focus point: 20cm. Small Spot Laser module for use with high-precision devices. Medical science. Bio-tech. High-precision 3D scanning. Precision measurement. (For more detail about the laser dot size, please refer to the product pictures.) ?Dot Size Laser Module. Laser dot size is less than 0.13mm at the distance of 20cm. (For more detail, please refer to the product pictures.) Focus point: 20cm. Small spot laser module for use with high-precision devices. Application: Medical science, Bio-tech, 3D scanning, precision measurement. Wave length: 630 ~645nm. Laser output power: less than 0.39mW (Class I). Dimensions: ?10.6 x 12.2 mm(?0.417" x 0.48"). 3~6 VDC operation. This module has integrated optic, laser diode, and APC driver circuit. APC Driver Circuit enables the Laser output power safe and constant. Please notice: laser modules are not supposed to be sold with any power source, power supply, or wiring terminals. Because modules are simply components, and it means that you have to wire it to your own power source by yourself.