Micro Direct Micro I Operating Manual page 11

Running Micro I PC Software
Connect your Micro I to a USB port on the PC using the cable
provided. The Micro I will take power from the USB port on the
PC. Please be advised that the Micro I requires a high current
USB port and if connected to a lower power USB port the device
will turn itself off and fail to respond to any key presses until
disconnected. Low power USB ports are commonly found on
keyboards and unpowered USB hubs and should not be used.
While connected to the PC, the Micro I will display:
Do not allow the patient to handle the spirometer during this
procedure.
The Micro I PC software will automatically be launched when a
Micro I unit is connected to the PC, the first screen will show:
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