The Sony Ericsson IrDA Modem 116 Windows Driver is a software driver designed to enable communication between your Windows PC and a Sony Ericsson mobile phone (or other Sony Ericsson devices) via Infrared (IrDA) connectivity. IrDA (Infrared Data Association) allows for wireless data transfer between devices that support infrared communication. In this case, it allows your Sony Ericsson phone to function as a modem or connect to your PC for data transfer, Internet access, or synchronization.

This driver is commonly used in situations where the PC does not have Bluetooth or when you want to connect your Sony Ericsson device to the computer via infrared to use it as a modem for internet access.