Monitor Calibration Device - latest model x-Rite i1 Display Pro Screen calibrator up for rent.
Can perfectly colour calibrate your monitor, projector or TV after installing some simple software. More useful than you could imagine, corrects colour problems in old monitors even.
Calibration device only (no colour cards etc available, and not required for monitor calibration)
Please check your monitor has adequate manual adjustments to be fully compatible, though otherwise partial calibrations should still be possible.
XRite i1 Pro Calibrator reviews