Brand new and high quality, buy with confidence 
Tx transmitter, rx receiver 
This HDMI extender-integrated wireless transmission protocol can transmit wireless HD audio and video signal, at the same time the device has a drawn image processing and transmission capacity, power signal 
Transfer more smooth and stable, is a kind of economic and efficient way of HDMI signal extension. 
It will be widly for charges video conferences/home entertaining/online learning/business language lessons training/game etc. more shocking, more relaxing and is better for protecting the eyes

High-quality HDMI radio transmission The standard technology for the transmission of wireless HDMI transmitters and receivers makes the transmission efficiency faster and more stable, with only 129ms latency (almost in real time). The wireless hdmi sender receiver kit up to 164ft/50m between laptop and switch display. 
Full HD 1080p Fidelity Video The wireless HDMI transmitter and receiver supports the video resolution up to 1920 x 1080 x 60 and more resolutions, automatic encoding, transmission and decoding keeps the video quality, support the full RGB color scale without compression or artifacts. 
Plug and play easily connect sender (tx) to hdmi port to pc/laptop, then connect receiver (rx) to hdmi port to hdtv/projektor/monitor. Driver free and plug-and-play experience. Mini size and easy to wear them at any time. 
Wide compatibility - compatible with most HDMI output devices, laptop, PC, Blu-ray player, camera, DVD, DVR, set-top boxes, cable/satellite boxes. Support for sharing Windows, Macos, iOS and Android screen, it is perfectly suited for you used for education, conference, broadcast & streaming. Note: Connect ps5/xbox to play games. It is recommended to use an HDMI cable. 
What you get 
1 * Sender (tx), 
1 * Receiver (rx), 
1 * hdmi male to bus, 
2* Micro USB cable, 
1 * User manual (Note: Power supply not included).