Simple install. Windows XP, Vista and Windows 7 will automatically recognise it and install a base driver.
ASCOM driver allows USB Guider to be used by any software package which can leverage the ASCOM standard for guiding.
All outputs are optically isolated to ensure that your mount and PC do not interfere with each other.
A diagnostic mode allows you to see what the device is actually doing this can be used by you as part of the diagnostic process for autoguiding.