1. Multifunction Bluetooth Audio Adapter, RX & TX & USB U-Disk & TF 2. Integrated Reception/Transmission With Easy Mode Switching Suitable For Devices 3. Using Bluetooth 5.4 Chip Design, It Has Better Compatibility And Stability, Is 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 Pho , Speakers And Other Devices 4. For Cars Without Bluetooth Function, Vou Can Connert The Car'S Aux Port To The Adapter Through An Audio Cableu Bluetooth On Yoar Phone, Search For "B58", And Click Connect 5. In Rx Receiver Modelladd Bluetooth Wireless Function To The Wired Speakers/Headphones, So That Devices With Bluetooth Functions Such As Mobile Phones Can Connect Wirelessly To The Wired Speakers/Headphones Through The Adaster. 1. Product Name: Multifunction Bluetooth Audio Adapter 2. Product Model: B58 3. Bluetooth Version:V5.4 4. Interface: 3.5mm AUX Stereo/USB/TF 5. Transmission distance: ≤ 10m 6. Function Mode: RX/TX/U-Disk/TF 7. Battery Capacity: 200mAh(3.7V) 8. Charging Time: About 1hours Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Not Affect The Use Colour:As Shown Material:ABS Package Contents: 1 x Bluetooth Audio Adapter 1 x 3.5mmaux Audio Cable 1 x Type-C Charging Cable 1 x English Instruction Manual 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.