[RX & TX 2-in-1 Mode]: Transmitter Mode: Wirelessly stream audio from a non-Bluetooth TV, home stereo system, or CD player to a Bluetooth headset or speaker. Receiver Mode: Wirelessly stream audio from a phone, tablet, or computer to a wired stereo, speaker, or headset. No microphone...[Easy to operate]: Simply flip the switch to switch between transmitter and receiver modes. Easily connect with advanced Bluetooth technology and a 3.5mm audio cable (included)...[Ultra-portable audio streaming]: Only 44mm (1.73 inches) in width and weighs only 18g (0.63 oz), yet has wireless audio streaming. Slide the transmitter and receiver into a backpack or laptop bag and easily carry it with you...[Wide Compatibility]: This receiver transmitter adapter can be widely used with your computer, laptop, home stereo system, headset, smartphone, Mp3 player with included 3.5mm cable and 3.5mm to 2RCA cable. , CD player, etc. It does not support optical audio output like Samsung smart TVs