Built in , with LED light guide , charging for 20 minutes and learning for 2 hours type installation , quick installation and disassembly All inclusive design , 360 ° comprehensive for protection , no damage to the lens Adjust the Microscope clip onto your phone camera , keep the microscope lens aligned with your phone main camera Our smartphone microscope can be widely used for exploring the world in various fields like children ' s exploration , observation , industrial testing , money detection , jewelry & antique evaluating , a perfect tool to view the micro-world, Manufacturer: Watreketal