Estone Android Robot Micro USB 2.0 Host OTG Flash Disk Adapter Converter For Samsung S4 OTG Function allows you to transfer files from USB flash drivers and connect USB peripherals Easily back up essential files stored on your phone Stream movies and music from your external hard drive on your phone High Speed USB 2.0 certified cable, up to 480 Mbps transfer rate The OTG feature of your smart phone must be available so this OTG adapter will work