1、Add Bluetooth to Wired Speakers: The bluetooth receiver allows any speaker or stereo system system with 3.5mm AUX audio input to receive Bluetooth wireless audio. 2、RX Mode: AUX audio interface input equipment is suitable for active audio, old audio, home theater, speakers, card speakers, etc. 3、TX Mode: The wireless audio adapter is suitable for desktop computers, TV sets, notebooks, projectors and other audio output interface devices, 4、Broad Compatibility: Stream audio without a physical connection from your for iOS, for Android, for Windows, or for Linux device, including for iPhone, for IOS tablets, for Galaxy. 5、Stable Performance: Universal wired compatibility, this bluetooth receiver works with home stereos, PC speakers, and Audio and Video receivers, no barrier effective distance is 10m/32.8ft. Item Type: Bluetooth Receiver Material: ABS Size: Approx. 55x50x27.8mm / 2.2x2.0x1.1in Bluetooth Version: V5.0 Frequency Range: 2400-2483.5MHz Frequency Response: 10-20KHz Interface Type: 3.5mm Audio Hole SNR: >90db Effective Distance: Barrier Free 10m/32.8ft Functions: RX Mode (Receiving Mode), Suitable for Active Audio, Old Audio, Home Theater, Speakers, Card Speakers and Other AUX Audio Interface Input Equipment, Upgrade The Ordinary Wired Audio to Bluetooth Stereo, Wireless Transmission of Music From Mobile Phone to Audio Equipment TX Mode (transmit Mode), Suitable for Desktop Computer, TV, Notebook, Projector and Other Audio Output Interface Equipment, Instant Nerve Bluetooth Function, Wireless Connection Bluetooth Headset Or Bluetooth Audio, etc. 1 x Bluetooth Receiver