The Philips CDI 310 EMC/EMI Testing Unit is a transportable CD-i player with an integrated floppy disk drive, showing multiple signs of being a pre-production unit built for EMC/EMI compliance-testing. It appears to have been custom-built out of a CDI 350 rather than manufactured as a standard retail model.

Advertised as the Philips Transportable CD-i System with floppy disk drive, the Philips CDI 310 likely never reached the market in significant numbers. According to Philips’ product introduction sheet, the model was positioned as a professional multimedia platform combining a CD‑i player, floppy disk drive, and pointing device for institutional or professional use. The floppy drive was intended for storage and updating purposes, making the system suitable for training, presentations, and POI/POS installations. Only a handful of 310 units have surfaced so far, which makes the one documented here particularly special.