Hollyland Mars 300 PRO Wireless Video Transmitter This is a set of transmitter and receiver. It's a very convenient product because it can output video wirelessly. I purchased it used a year ago and used it for about a year, but I no longer use it, so I'm selling it. The exterior shows signs of use, but I have confirmed that it works without any problems. Please feel free to comment if you have any questions. Thank you. ● Main Features One wheel button on the side for main unit operation Equipped with an organic EL display on the side Line-of-sight transmission distance to the receiver: 120m Line-of-sight transmission distance to the app: 90m Transmission delay: 0.1 seconds The transmitter is equipped with an HDMI input terminal and an HDMI loop output terminal The receiver is equipped with two HDMI output terminals Supports USB-C power Transmission from one transmitter to one receiver and two apps is possible (if the receiver is not used, transmission to up to three apps is possible) Automatic channel selection