2 in 1 Design: This Bluetooth adapter can stream music from mobile phone, computer, or tablet to wired speaker or earphones through Bluetooth, and can also stream music from non Bluetooth devices such as TV, computer to Bluetooth earphones or speaker.3.5mm AUX Plug: This Bluetooth adapter is equipped with a 3.5mm AUX plug, can be connected to non Bluetooth car stereo system, home stereo, speaker, wired earphones.Bluetooth 5.3 Chip: This wireless audio adapter adopts Bluetooth 5.3 chip, ensuring stable connection, fast transfer, and wide signal range.Long Battery Life: The Bluetooth adapter has built in 200mAh li ion battery, allowing for up to 15 hours of playback time, supports simultaneous charging and working.Handsfree Calls: You can insert this Bluetooth adapter into the car and answer calls handsfree while driving. CVC8.0 noise cancellation and digital signal processing technology eliminate echoes and block invasive background noise, creating lossless sound quality.