Product Description: 1.The RX cannot be work alone, pls do not buy it seperately RX must be used with a TX! you can buy up to 4 RXs to use with 1 TX 2.Can't go through walls or any barriers,pls use it in a barrier-free open space because the walls,barriers will block signal transmission, if need to use go through barriers,pls contact us to buy our 300m version. 3. With the increase of RXs, or the barriers, the wireless transmission distance will be shortened. such as : 1 TX to 1 RX transmission distance: max. 50m; 1 TX to 2 RX transmission distance: max. 30m; 1 TX to 3 RX transmission distance: max. 20m; 1 TX to 4 RX transmission distance: max. 10m; The final distance shall be subject to the actual use. 1. Introduction: Our product is Imported chip and upgraded antenna version, support longer transmission distance and more stable Brand new and high quality,buy with confidence TX=Transmitter,RX=Receiver This HDMI extender built-in wireless transmission protocol,it can wireless transmit HD audio and video signal, at the same time,The equipment has excellent image processing and transmission capacity,makes signal transmission more smooth and steady,is a kind of economic and efficient way of HDMI signal extension. It is widly used for Big screen video Conference / home entertainment / online learning / business speech education training /playing game etc. more shocking,more relax, and is better for protecting eyes 2. Features: 1. HDMI video and audio transmission via built-in wireless transmission protocol,no need wifi or internet 2. HDMI 1.3 ,HDCP1.2 compatible; 3. Support regular HD video resolution 1920x1080@60Hz ; 4. The transfer is efficiency to ensure that the playback fluency; 5. Built-in automatic balance system, the picture is fluent, clear and stable; 6. The built-in ESD electrostatic protection circuit, comprehensive security protection system; 7. Simple and convenient installation, plug and play, do not need to set up. Package Content For the option of " Only 1 RX " : 1. HDMI Receiver 1 PCS 2.HDMI Extension Cable 1 PCS 3. USB Power Cable 1 PCS Note: if you choose " Only 1 RX" , it comes only the accessories of 1 RX, no TX 's Package Content the option of : 1 TX and 1 RX : 1. HDMI Transmitter 1 PCS 2. HDMI Receiver 1 PCS 2.HDMI Extension Cable 2 PCS 3. USB Power Cable 2 PCS 4. User Manual 1 PCS Responsible Person Name: Wang Zhouli Responsible Person Address: Am Waldfriedhof 4 Stutensee Baden-Württemberg Germany Responsible Person Email：EUVERTRETERSUALMUGMBH@outlook.com