You can use this  for: Industrial Inspection, Computer Parts inspection, Telecom module inspection, scientific teaching tool, Laboratory Research, Medical analysis, School Research tool, Insect dissection examination, Plant dissection examination, Skin examination, Scalp examination, Textile Inspection, Jewelry Inspection, Collections/Coin Inspection, Printing Inspection, Reading Aid, Teacher Add as Project, Presentation and so on.   Note: 1.Only support Anroid 4.0 system and above Anroid 4.0 system, does not support IOS system; 2.Your Anroid phone must support  OTG function and external camera, please confirm carefully before ordering. 3.If you can not use it on your phone(some OTG can not support this endoscope),don't worry, you can use it on the computer.(Windows xp/7/8/10) Specification:     mage CMOS Sensor     Controller: High Speed DSP     Lens: Micro-Scope Lens     Focus Range: Manual Focus from 3mm to 40mm     Snap Shot: Software and Hardware     Frame Rate: Max. 30f/s Under 600 Lux Brightness     Flicker Control: 50Hz / 60Hz Option     Video Format: AVI     Snap Shot Format: JEPG     Light Source: 8 White Light LED (with controller on USB cable)     Magnification Ratio:40 to 1600x     Power Supply: USB Port (5V DC)     Software : AMCAP(Driver)     System Requirement: Pentium Computer with 700MHz & Above, 20M HD Space CD ROM Driver,     128MB RAM, Direct X VGA Card     PC Interface: USB2.0 & USB1.1     Operation System: Windows 7 32 bit /Vista/XP     Dimension: 112 mm ( L ) X 33 mm ( R )     Accessories: A1-Alloy Stand, CD ROM (Driver), Cover, emandation rule.   Standard Package Content: 1x USB Microscope with Window USB port and Anroid  Micro USB  port 1x Stand  1x Ruler   Add Type C Package Content: 1x USB Microscope with Window USB port and Anroid   Micro USB  port 1x Stand  1x Ruler 1x Type C Adapter for  Type C  Android Phone (Digital Microscope Deriver, English Manual please download from this link)   Microscope Driver please download from here: https://drive.google.com/open?id=0ByU8SNTfMEFMM0lIQnZvMmVOUUU