3-in-1 transmitter & receiver & U disk : The Bluetooth Audio Adapter has three functions, support Bluetooth transmitter, Bluetooth receiver and U disk. You can play music through Bluetooth connection, you can also parse the audio from the U disk for playback. Bluetooth 5.0 & Stable Connection: Latest Bluetooth 5.0 technology, delivers the superior sound ; External antenna design, reduces signal interference and can receive Bluetooth signals within 40m/131ft, offer more stable transmission, so you can enjoy CD-like sound . Wireless connection: This Bluetooth receiver can convert non-Bluetooth devices to Bluetooth devices for wireless connection, suitable for car radios, old stereos, TV, desktop computers and other devices. In receive mode, wired devices can play the music is on Bluetooth device; In transmitter mode, Bluetooth devices can receive the sound on the wired devices. Multiple connection: This Bluetooth adapter not only supports RCA and AUX transmission, also can be inserted into the U disk, so you can enjoy the music anytime and anywhere Easy to operate: The bluetooth audio Adapter can connect Bluetooth devices and U disk at the same time, just a key to switch between different modes; it is designed with a of functional indicators, more intuitive to see the product's functional status, easy to use. color:Black Material:plastic Package Contents: 1 x Bluetooth Transmitter Receiver 1 x USB Cable 1 x Audio cable Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.