The Sony Ericsson Device 3017 USB WMC OBEX Interface driver is a Windows driver designed to support communication between a Sony Ericsson mobile device (such as a smartphone) and a computer over a USB connection. The WMC OBEX (Object Exchange) Interface specifically facilitates the transfer of files, contacts, and other data between the phone and the PC using the OBEX protocol, which is commonly used for wireless data transfer between devices. This driver is part of the software package that allows your Windows computer to recognize and interact with your Sony Ericsson phone over a USB connection.