Apexel 65x LED UV Mini Microscope Jewellery Magnifier Glass Lens with Back Case for Samsung Galaxy S4 Portable and convenient design, easy to carry with your mobile phone Simply connect to your phone camera lens and the screen will show you what you're looking at UV LED for detecting fake or counterfeit currency. Applications: currency detecting, jewelry & antique evaluating, crafting and repairing etc. LED with On/Off switch, the LEDs are powered by 3 LR1130 cell batteries. Magnification: 65X Come with hard plastic back holder case, it can be installed on the back case of Samsung galaxy s4