Arduino programmers usb and ics arduino a000004 the arduino usb host shield lets your arduino control usb peripherlas such as hid devices mass storage android adk devices and others it complies with usb specification revision 20 full speed 12mbps peripheral full low speed 12mbps15mbps host though actual throughput will depend on the arduino the on board max3421e usb peripheralhost controller handles the electronic and low level usb protocol interfaces for you it also protects ag