Many Android devices on the market today support a technology called USB or USB OTG for short. USB OTG allows you to turn your Android mobile phone or tablet into a USB host and connect standard USB mobile accessories, including the following. USB Flash Disk/Data Traveler Flash Drive. Digital Camera. Mobile Phone. MP3 / MP4 Player. Computer. Wired Controller. Wired Mouse. Wired Keyboard. Sound Card. External Hard Disk. USB Lamp. USB Fan. Card Reader. Phone Charging by Another Phone through cable. Tablet through cable. USB Hub. Network Card. Wireless Mouse. USB LAN. Other USB Devices. USB Speakers. USB Printer.