Here is a Datacolor Spyder 4, unit powers on when plugged into USB .
the rubber portions are getting starting to become "old sticky rubber"
sold as-is.
Please note that items could take up to 5 business days to ship, especially if they are something i intend to have The UPS Store package as it is a 2.5hr round trip for me to take things down there. if that is a problem for you or you'd like to know When i may ship, feel free to inquire Prior to purchasing.