Fangrui Product Details 1.2 In 1 Audio Adapter:this Adapter Functions As Both A Receiver And A Transmitter, Allowing You To Effortlessly Switch Between Transmitting Audio From Your Tv, Pc, Or Other Devices To Your Bluetooth Headphones Or Speakers, And Receiving Audio From Your Smartphone Or Tablet To Play Through Your Wired Speaker 2.bluetooth 5.4 Version:experience High-quality Audio Transmission With Minimal Latency, Thanks To Advanced Bluetooth Technology. Enjoy Your Favorite Music, , And Games With Immersive Sound Quality. 3.tf :support Max 64gb Card,the Music Format Is Mp3/wma/ape/wav/flac(tf Card Not Included) 4.built-in 200mah Battery, Our Adapter Offers 6 Hours (after Full Charging(of Uninterrupted Playback Time, Ensuring You Can Enjoy Your Entertainment Without Interruption. 5. Compatible With A Wide Range Of Devices Including , Pcs, Laptops, Smartphones, Tablets, And More. Say Goodbye To Tangled Wires And Enjoy Wireless Freedom With Any Audio Source! Colour:black Material:abs Package Contents: 1 X Bluetooth Adapter