1、USB BT 5.0 Adapter: BT voice frequency transmitter, wireless music transmitter, support calls. 2、Anti Interference: Apply the latest BT 5.0 adapter. The anti interference ability is enhanced, and new technology is adopted to reduce the loss of transmission efficiency caused by interference in the 2.4GHz frequency band. 3、Mini Size: The ultra compact USB adapter allows you to leave it on your laptop or PC without removing it, without blocking surrounding USB ports, saving space. 4、Applicable To: Computer, TV, projector (transmitting mode); wirelessly connect BT headphones or speakers to the computer, enjoy music, and answer calls. 5、Plug and Play: No installation required, no need to install drivers on the computer. Item Type: Usb Adapter Product Material: ABS BT: 5.0 Interface: USB Applicable To: Computer, TV, Projector (Transmitter Mode) Product Size: Approx.26 x 15 x 9.3mm / 1 x 0.6 x 0.4in 1 x USB Adapter 1 x User Manual