Micro USB OTG Host Cable For Samsung Galaxy S3 This USB Host adapter cable allows you to connect a USB memory stick, a USB memory card reader, BUT please note some standard USB devices may not function if they consume too much power. PC-free back up of videos and photos from Samsung Galaxy S3 to an external memory stick in a convenient way, Connect to a keyboard for easier control of your Samsung Galaxy S3. Create a simple way to connect mobile devices to a USB capable computer for every day tasks such as data synchronization and file transfers. Compatible with Cellphones, GPS systems, PDAs, OTG devices, digital cameras, etc. Direct support OTG function of mobile phone connection U disk, keyboard, mouse, digital camera and peripheral equipment Part of the large equipment, such as mobile hard disks may need additional power drive.