BenQ QCast description

"Thank you for choosing BenQ Video Streaming dongle - QCast, which works with the BenQ QCast software (installed on your mobile device or computer) and enhances video and music playback, document review, web surfing, and live video streaming.
You are provided with quick wireless connection and projection via NFC without any text input. And then you can mirror the content from your mobile
device to a display wirelessly as it supports Miracast. The dongle can be connected to any display such as projector, LCD monitor, or TV, as long as supported I/O ports are available. In this document, connection with a projector is used as an example. The installation and operation may vary by the connected devices.
For more information, visit www.BenQ.com > Product > Projectors > Accessories & APPs, and select QCast."