I have a X-rite Spectrophotometer model # DTP41b It has the serial and USB connections. Checked the operation with Photoshop at previous job.Tested good. The calibration strips got lost in move but can be purchased online. Ebayers are charging up to $1000.00, I acquired mine from an estate computer auction and have no need for it, mine is for sale at $700.00. No lowball offers please, this is a print shops dream for calibrating color software to copier.