This upgraded 2-in-1 Bluetooth adapter is equipped with the latest Bluetooth technology, boasting faster transmission speed,more stable connection,and lower latency,thus delivering a smoother wireless audio experience It supports dual modes:In Bluetooth receiving (RX) mode,it can easily enable wireless connection between mobile phones and non-Bluetooth devices such as old speakers and amplifiers,reviving the vitality of these old items.In Bluetooth transmitting (TX) mode,it can wirelessly transmit audio from devices like TVs,airplanes,and computers to Bluetooth headsets or speakers,completely freeing you from the tangles and constraints of traditional audio cables and making wireless listening more free and hassle-free