USB C OTG Product Description. OTG Cable USB C Specification: Characteristic: Charging + OTG. Material: Aluminum Alloy+Nylon Braided. Plug and play, no driver required, suitable for mouse, keyboard, USB flash disk, portable hard disk, charger, card reader, printer, gamepad and many other interface devices. Important Note Before Purchase: 1. Please make sure your mobile phone or tablet supports OTG function, and for certain mobile phones, please go to phone’s setting menu and enable ’OTG function’. 2. The transmission rate is subjected to the limits of SD card, external hard drive and flash drive. Compatible with some devices.