The Sony Ericsson W700 USB WMC OBEX Interface Windows driver is a software package that allows your Sony Ericsson W700 mobile phone to communicate with your Windows computer via a USB connection. This driver enables various functions, such as file transfer, syncing contacts, and managing media files between your phone and your PC.

The WMC (Wireless Media Connection) part typically refers to a set of protocols and features for wirelessly managing media, but in the context of this USB driver, it's most likely related to enabling a standard USB connection for file transfers and other management tasks. The OBEX (Object Exchange) part refers to a communication protocol that allows the exchange of files between devices, such as transferring photos or music from the phone to the computer.