It's a tool for Endoscope, USB Microscope, USB camera.
Main tips: 1) Connects noname USB cameras, Endoscopes, Microscopes. 2) Supports external microphones - USB, Bluetooth and wired ones. 3) Saves video recordings to the smartphone's folder (/DCIM/4me). 4) Both newest Android OS and latest smartphones (Redmi, Vivo, Pixel and so on) are supported.
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