I purchased a used item that had been MMCX-modified. I'm selling it because I didn't like the sound quality. Although it has been modified, it works without any problems. Since it's MMCX-modified, you'll have a wider range of cable options. The cable is an AZLA HORIZON, 3.5mm. There is white staining on the sheathing of the left and right connectors of the cable (it looks like a semi-transparent resin, possibly adhesive or tape) that I couldn't remove. Both the cable and the earphones are in good working order, and the connection works perfectly. Please consider the cable as a bonus due to the staining. When shipping, I don't plan to include the box, so please let me know if you need it when you purchase. #mmcx #Sennheiser #SENNHEISER #IE #40 #pro