1. Portable wireless audio transmitters and receivers are ideal wireless audio solutions for various situations and applications. 2. Transmitter mode: wireless transmission of audio from non-Bluetooth TV, home stereo system or CD player to Bluetooth headset or speaker. 3. Receiver mode: wireless transmission of Bluetooth-enabled mobile phones, tablets or computers to wired stereo systems, speakers or headphones. 4. Put the transmitter and receiver into your backpack or laptop bag, and carry them anywhere and anytime without any effort. Port: USB-A Network Standard: 24 GHz: 802.11b/g/ax Transmission Rate: 24 GHz: 287 Mbps Max Compatible Systems: FOR 7/10/11, Linux Color: Black Material: plastic Size:100m Package Contents: 1 x Wireless Network Card Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.