Don't Need To Drive Plug and Play Multiple interface ,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.Support a Wide 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. Capacity Lithium Battery Long Endurance Experience 500mAh -capacity lithium battery with a battery life of up to about 10 hours.Product Mode:D300-HDBluetooth Version:CSR Qualcomm Bluetooth V5.2Interface: 3.5mm AUX/Coaxial/Optical Fiber(Note:Only one interface is supported for output, three interfaces do not support simultaneous audio output)Transmission distance:About 15MCharging Type:Type-CCapacity of Battery:500mAhWorking Time:About 10 HoursAudio Codec: /-HD//AACRange:2400MHz-2483.5MhzFrequency Response:20Hz-20kHzProduct Size: 73x70x20mmCompatible Devices: For Wired Speaker/Home Speaker/Power amplifier/Headphone/Car kit EtcColour:Photo ColorMaterial:PC+metalPackage Contents:1 x Host1 x Antenna1 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.