1. Bluetooth 5.0 Adapter: Strong Compatibility, Universal For , Computers, Headphones, Mice And Keyboards, Suitable For Home Audio And Video, Cars And Offices, Etc.2. Bluetooth 5.0 + : More Compatible, More Stable Signal Transmission, 10 Meters Barrier-Free Transmission3. Transmission And Reception 2-In-1: One Adapter Dual-Mode, Meeting Both Sending And Receiving Functions4. Free Driver: Plug And Play, Free Driver Installation, Quick Pairing, Very Convenient To Use5. Ordinary Speakers Are Upgraded To Bluetooth, With Built-In 5.0 Bluetooth Chip, Smart Compatibility, And Built-In Memory Chip. After Connecting Once, Subsequent Connections Will Be Made Automatically Without Manual Effort.Interface: 3.5mm USBTransmission Rate:3Mbps (Mbps)Working Frequency:2.4Mhz (Mhz)Whether Plug And Play:Plug And PlayEffective Working Radius:10mNote:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The UseColour:BlackMaterial:ABSSize:About:30x18mmPackage Contents:5 * Audio Receiver5 * Audio CableOnly 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.