Fangrui Product Details Features: 1. Easy To Use: Bluetooth-compatible Version: 2.1. There Is No Need To Install Any Software, Plug And Play. 2. Wireless Bluetooth-compatible: The Tv Sound Is Transmitted To The Home Combined Speaker Through Bluetooth-compatible, So There Is No Need To Worry About The Trouble Caused By Wiring. 3. Enjoy The Music: By Transmitting Tv Sound To Bluetooth-compatible Headset Through Bluetooth-compatible, You Can Enjoy The Shocking Sound Effect Alone In The Dead Of Night Without Worrying About Disturbing Others. 4. Wide Usage: This Bluetooth-compatible Transmitter Is Not Only Suitable For Home Use, But Also For Classroom Speeches And Conference Speeches. 5. High Performance: Speak Directly To The Products Mark Air Outlet, And You Can Transmit The Speech Sound To The Bluetooth-compatible Speaker. There Is No Need To Worry That Is Too Small To Be Heard By Others. Specification: Interface: Usb Wireless Type: Bluetooth-compatible Wifi Standard: None Content: Audio High Definition Support: None Model Numb