K16 2 in 1 3.5mm AUX + RAC Dual Output Plug-in Bluetooth 5.0 Audio Transmitter Receiver with Remote Control, US Plug Features: 1. Using Bluetooth 5.0 chip 2. Support Bluetooth receiving (RX) and Bluetooth transmitting (TX), two functions in one 3. Can read TF cardU disk, support MP3flacwavwamape format songs 4. Exclusive mobile phone APP control, up and down songvolume adjustmentsound effect adjustmentswitching of playback sound source 5. Support infrared remote control, switch onoffmuteplaypauseup and down songvolume updownsound source switching 6. Support 110-220V power supply in-line, universal 7. Built-in QC2.0 fast charge module, support 2.1A dual USB fast charge, easy charging for mobile phones, tablets, etc. 8. AUX+RAC dual interface output, can connect 2 speakers and other equipment at the same time 9. Bluetooth transmission distance is 10 meters, built-in high-definition decoding chip 10. Weight: 65g 11. Size: 57x50x20mm 12. Launch mode: suitable for original Apple AirPods headsets (basically not supported by the market models)