This wireless HDMI video transmitter receiver kit is designed for casting and mirroring TV and PC monitor. It consists of a transmitter and a receiver. To use, simply install the receiver, connect it to your screen and power it on. Then, plug the transmitter to your laptop, connect it to the power supply and wait for mirroring to start automatically. To stop mirroring, remove the transmitter and plug it back in to restart. This kit is perfect for wireless video transmission and display.