Don't Need To Drive Plug and Play - Multiple interface designs,Meet multiple requirements, easy for older devices to have Bluetooth. Multi-Device Expansion Port Better Connection Effect - Bluetooth Audio receiving mode,3.5mm AUX/Coaxial/Optical Fiber audio output,multi-device expansion interface,let you feel better connection effecet. Older Speakers Upgaded Bluetooth Speakers - Connect old speaker or power amplifier 3.5mm AUX/Coaxial/Optical Fiber interface and fiber coaxial interface,Solve the problem that the speaker does not have Bluetooth and cannot use Bluetooth to play. Support a Wide Variety Of Power Amplifier Equipment - Compatible with all kinds of old audio amplifier equipment,strong signal without delay,-HD High fidelity,enjoy CD-Grade sound quality. Support -HD Low Latency+High Restore - High fidelity -HD enables Bluetooth to have CD-Level sound quality HiFi shock lossless sound quality,high fidelity audio data restoration.Let the wireless connection enjou the wired connection sound quality experience. Large Capacity Lithium Battery Long Endurance Experience - 500mAh large-capacity lithium battery with a battery life of up to about 10 hours. CD Lossless Sounds Quality -HD HD Decoding - -HD decoding technology enables Bluetotoh to have CD-Level sound qualtiy.Enjoy non-destructive shock sound quality. Bluetooth 5.2 Chip Music Starts With The Core - Bluetooth 5.2 chip,stable signal transmission,Low latency +high restore allows audio signals to be transmitted wirelessly. With Antenna,Long distance, stable transmission - 15M Barrier-free Transmission Receive No Pressure. Color:Grey Material:Aluminum Alloy Package Contents: 1 * Adapter 1 * AUX audio cable 1 * cable 1 * Optical Fiber audio cable 1 * Charging cable 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.