Features: 1.Widely compatibility: With the included 3.5mm cable, this receiver transmitter adapter can be used on computer, laptop, headphone, smartphone, Mp3 player, CD player, etc. 2. Superior performance: It has got powerful wireless audio streaming capabilities and easy to use. 3. Transmitter mode: Wirelessly streams audio from your non-Bluetooth TV, home stereo system, or CD player to your Bluetooth headphones or speakers. 4. Receiver mode: Wirelessly streams audio from your Bluetooth-enabled phone, tablet, or computer to your wired stereo, speakers, or headphones. 5. Portable design: It is just 18mm (0.63”) across and weighs only 18g (0.63oz), you can take it on-the-go without the slightest effort. specification:Model: X01 Technologies: BT5.0, A2DP, AVRCP (receiver mode only) Operation Range: Up to 10m / 33ft (without any blocking objects) Pairing name (Receiver mode): X01 Transmitter mode: red LED light is on Receiver mode: blue LED light is on PackageList:1x Bluetooth 5.0 Audio Transmitter/Receiver Adapter 1x 3.5mm Aux Cable 1x User Manual