Feature: 
* Read almost all your memory cards with speed and convenience. 
* Excellent quality.Made of durable, high-grade plastics and premium chips. 
* Memory Card Reader with OTG(USB C device/Android phone/Tablet must with OTG function) 
* Backup your important Photos, Music, Videos, and Contact list 
* Portable for business(convenient for file work) 
* Document viewer for all major file formats 
* Securely store and share digital contents such as movies, pictures, and music from your phone 

Compatitable for: 
all the USB C device/android phones/Tablet with OTG function 

Supports 
SDHC (UHS-I), SDXC (UHS-I), microSD, microSDHC (UHS-I), and microSDXC (UHS-I) 

System requirements. 
Windows XP/7/8/8.1/10/Vista/Linux 
Mac OS X v10.3.9 or later 
Available USB C port or USB port or micro USB port 

Precaution Notice: 
* USB C device/Android Smartphones/Tablet do not download app,but need otg function 
* Please do not disconnect card reader during file transfer. 
* Please do not connect both side of card reader at the same time. 
* Please do not use card reader as cable. 
* Please insert your memory card into the device before connect to your Cellphone or Tablet. If your phone case is thick, please take it off before using the device.