Left Angled 90 Degree Micro USB OTG to Standard B Type Printer Scanner Hard Disk Cable 60cm Connector 1: Left Angled 90 Degree Micro USB OTG Male Connector 2:Standard B Type Male (can connect the external device) Maybe you need to install the driver for your printer,scanner, hard disk or other device, please make sure you have these driver first. Length: 60cm