1.Bluetooth 5.3 audio transmitter,built-in Blutooth 5.3 version chip ,stable and faster connection,compatible with mobile phone,tablet,TV,computer ,speaker ,headphone and other devices,transmitter mode support transimt the signal from TV,computer to Bluetooth headphone or speakers. 2.Support LC3,SBC,ACC,aptX,aptX-LL,aptX-HD,aptX-AD audio codec,boasting high fidelity CD quality stereo sound streams seamlessly 3.Support Auracast(Broadcast audio) audio,under broadcast mode,nlimited auracast-enabled headphones or speakers can be connected in this mode. 4.With 3.5mm,Coaxial,and Optical audio input,rich interface can work for different devices. 5.Built-in 1000mAh battery,long standby time.after full charging ,can keep working for 8-15 hours Compatible with all QCC3084 Bluetooth headsets or speakers. Bluetooth version:V5.3 Audio codec:SBC/AAC/aptX/aptX-LL/aptX-HD/aptX-AD/LC3 Mode:Bluetooth transmitter+Auracast audio Battery:1000mAh Charging time:2.5H Working time:BT:15h/BA:8h Colour:Black Material:Plastic Package Contents: 1 x Audio Transmitter 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.