2-in-1 Bluetooth 5.4 Audio Adapter - Bluetooth transmitter(TX Mode) allows you via 3.5mm cable to transmits audio from , PCs, airplane entertainment to Bluetooth headphones, earbuds, bluetooth speakers. Bluetooth Receiver(RX Mode) connected your smartphone to wired speakers/earphone through Bluetooth. Built-in Microphone - Built-In High-Definition Microphone, Support Wireless Music Listening, Hands-Free Call, Navigation;(Note:Only Receiver Rx Mode Support Mic Calling,Tx Transmitter Mode Is Not Supported Microphone) Dual Link, Share Your Happiness - The Bluetooth transmitter can be paired with two wireless earphones or Bluetooth speakers at the same time in TX mode. In RX mode, you can connect to the Bluetooth of two mobile phones at the same time. You can share audio with your friends and lovers. Note that audio latency will be amplified in dual mode, expecting a high latency of 200ms. New Upgrade - Using Bluetooth 5.4 Chip Design, It Has Better Compatibility And Stability, It's Backward Compatible With More Bluetooth Versions, And Better Connects With Mobile Phones, Tablets, Cars, Computers, Laptops, TV, TV Boxes, Projectors, Power Amplifiers, Cable/Connect Wireless Headphones, Speakers And Other Devices Product Name:2-in-1 Wireless audio adapter Product Model:C83Pro Bluetooth version:V5.4 Transmission Distance:Open area up to 10 meters long with no obstacles Power Supply :Type-C interface Basic Functions:Wireless audio reception/transmission Features and functions:Can connect two mobile phonestwo wireless devices simultaneously Battery life:Approximately 9 hours for launch,13.5 hours for reception Support Mic:Yes, RX Receiver Mode With Mic Handsfree Calling Audio Interface:3.5mm AUX Colour:Black Material:Plastic Size:130mm x 28.5mm x 13.4mm(approximately) Package Contents: 1 * Bluetooth Audio Transmitter Receiver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.