EXCELLENT SHOPPING 450nm 200MW Blue Beam Light Powerful Laser Pointer Pen + Glasses

100% New and high quality Wavelength (nm): 450nm Laser power supply: 2*(3.7V 1500mAh 16340 Battery) Operating temperature: 0-35 Centigrade Operating mode: CW Lifetime: >5000hours Optical structure: Separation of crystal cavity design ...