Model No: BH4-B(Blue Laser Pointer) Body color: Black/Gold/Red/Navy Net weight: 129g Body material: Aeromagnetic Aluminum Switch: Constant on/off button Focus mode: Adjustable focus Battery: 2*16340 Rechargeable Li batteries Dimension：φ24*182mm Surface treatment：Hard anodizing Black/Red/Gold/Navy Wave length：450nm Output power： Blue > Cyan > Red > Yellow > Purple Light Price : Red < Green < Blue < Cyan < Purple < Yellow Light Poly thermal performance ( ignition ) : Yellow < Cyan < Green < Red < Blue < Purple Light Stability: Green = Cyan < Red = Blue = Purple = Yellow Light ( Green light is influenced by the climate, You may need to warm it up in cold environments) Please feel free to contact me if you have any questions. ALL problem will be resolve within 24 hours…..or as fast as humanly possible. Thanks for visiting my eBay store! Tell all your friends! Come back soon and see all the new cool stuff I will be adding! Have yourself an awesome day!!!!!