1. Don't Need To Drive Plug and Play: Multiple interface designs,Meet multiple requirements, easy for older devices to have Bluetooth. 2. Bluetooth Audio receiving mode,3.5mm AUX/Coaxial/Optical Fiber audio output,multi-device expansion interface,let you feel better connection effecet. 3. 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. Compatible with all kinds of old audio amplifier equipment,strong signal without delay,-HD High fidelity,enjoy CD-Grade sound quality. 4. 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. 5. -HD decoding technology enables Bluetooth to have CD-Level sound qualtiy.Enjoy non-destructive shock sound quality. Bluetooth 5.2 chip,stable signal mission,Low latency +high restore allows audio signals to be mitted wirelessly. Note: It's a Bluetooth audio receiver only, not a mitter. Can only be used for audio mission,So you couldn't use it for your keyboard, mouse, file fer. 1. Product Name: -HD Bluetooth Audio Receiver 2. Product Mode:D300-HD 3. Bluetooth Version:CSR Bluetooth V5.2 4. Interface: 3.5mm AUX/Coaxial/Optical Fiber (Note:Only one interface is supported for output, three interfaces do not support simultaneous audio output) 5. mission distance:About 15M 6. Charging Type:Type-C 7. Capacity of Battery:500mAh 8. Working Time:About 10 Hours 9. Audio Codec: /-HD//AAC 10. Range:2400MHz-2483.5Mhz 11. Frequency Response:20Hz-20kHz 12.Compatible Devices: For Wired Speaker/Home Speaker/Power amplifier/Headphone/Car kit Etc. Type: Bluetooth Receiver color:Silver grey Material:Aluminum alloy