The Sony Ericsson K510 USB WMC OBEX Interface Windows driver is a software driver that enables your computer to communicate with the Sony Ericsson K510 mobile phone through a USB connection. This particular driver is often required for transferring files, syncing contacts, managing multimedia content, or using features like OBEX (Object Exchange) for file transfers between the phone and the computer. OBEX is a protocol commonly used for wireless file transfers over Bluetooth, but this driver facilitates the connection over USB as well.