Feature: Transmitter Mode (TX): Wirelessly transfer audio from your non-BT TV, home stereo system, or CD player to your BT headphones or speakers. Receiver Mode (RX): Wirelessly transfer audio from your BT-enabled phone, tablet, or computer to your wired stereo, speakers, or headphones. USB Wireless Adapter, Wirelessly transfer audio from the PC, notebook to BT headset or speaker through USB port, no audio cable is required. It's compatible with BT-enabled smart phones, laptop, tablet and almost all BT-enable audio devices with standard 3.5mm audio jack. BT 5.0 chip, easy operation, fast connection, stable signal. Small size, easy to carry and store. Specifications: Model: ZF-169S Type: Audio Receiver Transmitter Material: ABS Color: Black Technologies: BT5.0 Operation Range: Up to 10m / 33ft (without any blocking objects) Dimensions: 32mm*17mm*8.5mm Package Size: 6.8 * 6.7 * 1.6cm / 2.7 * 2.6 * 0.6in Package Weight: 19g / 0.7oz Package List: 1* Audio Transmitter/Receiver Adapter 1* 3.5mm Aux Cable 1* User Manual