【UGREEN Bluetooth Receiver】 This compact receiver connects to the headphone jack (3.5mm AUX) to make wired earphones, car stereos, speakers, etc., Bluetooth-compatible. ■ Features & Functions ・Compact Design: Its very compact body makes it ideal for carrying around and using in a car stereo. ・High-Quality Sound Transmission: Supports Bluetooth, providing a stable wireless connection and clear sound quality. Used only 1 or 2 times. Body only.