The total length of the USB type C female to micro male head of the product is 26.2mm, and the outer shell is wrapped in black rubber. The back of the micro male head is equipped with springs to increase firmness. Functions of mobile OTG: 1. The phone can connect to a USB flash drive through OTG and read files from the USB flash drive and card reader. 2. The mouse can operate the phone through the OTG connection. 3. Some game controllers can be connected to OTG to enhance the gaming experience. 4. Some Portable storage device can read files of Portable storage device through OTG connection. 5. Cameras can be connected to OTG to read camera photos and videos. 6. Charge their phone, MP4, etc. through OTG. 7. Digital cameras can be connected using OTG to read the photo information of the digital camera. 8. The keyboard can input text and other information on the phone screen through OTG connection. The OTG function on mobile phones is to facilitate users to connect their phones to electronic devices such as USB drives, keyboards, mice, etc., and to use their electronic device functions normally or to charge other electronic devices.