Item Type: Bluetooth AdapterMaterial: ABSBluetooth Solution: 5.0 EDR, A2DP, HSP, AVRCPInput Voltage: DC5VFrequency Rate: 2.4GHz-2.48GHzInterface: Micro USB + 3.5mm/0.13inEffective Distance: 10m/32.8ftLength: the Unstretched Length is About 45cm/17.7in, and the Stretched Length Can Reach 1m/39.3inCompatible: Computer, TV, Projector (Transmission Mode)/Speaker, Earphone, Car Machine, Call (Receiving Mode)Package List1 x 2 in 1 Bluetooth Audio Receiver Transmitter Adapter1 x Manual1The new bluetooth audio adapter will upgrade your non bluetooth devices, enjoy wireless life without worrying about wired connections anymore, use bluetooth 5.0 technology to make the connection faster and more stable. 2Transmitter mode: insert TV, PC, CD player, MP3/4 and other non bluetooth devices and pair with bluetooth speakers, headphones, receiver mode: plug into a non bluetooth home or car audio system and pair with the bluetooth of a smartphone, a laptop. 3Low latency technology, enjoy end to end audio transmission speed, audio and video synchronization without delay, noise reduction technology, minimize transmission loss and provide you with a high quality sound experience. 4Plug and play, no need to install any drivers, the bluetooth audio adapter provides uninterrupted wireless music streaming and hands free communication while driving, protecting your driving safety and getting rid of boring car travel. 5The interface is gold plated, not afraid of oxidation, to further improve the sound quality, environmentally friendly materials and extension cable, natural length of 45cm/17.7in, pulling up to 1m/39.3in, convenient for you to use.