X-Rite iSis 1 & 2

Note: All iSis models (other than the iSis Net in network mode) have an idiosyncrasy with their power indicator. The iSis must be plugged into a computer’s active USB port before the iSis power light lights green - regardless of whether the iSis power switch is on or off. This is unlike any other independently-powered USB peripheral we’ve ever encountered and could lead you to believe the iSis or its power supply is faulty. Also, as an extra idiosyncrasy, even though a connected iSis’s power switch is off, and sometimes even when it’s unplugged from power, it can still appear on the USB bus implying it’s powered and turned on. The iSis is a great instrument, but these features? not so much.