The TaoTronics TT-BA06 Bluetooth 4.0 Stereo Transmitter is a black adapter that allows for wireless connectivity to audio receivers. With a 3.5mm jack port, this unit is designed to easily transmit stereo audio wirelessly. Featuring Bluetooth v4.0 technology, this transmitter offers a reliable and efficient connection for your audio devices. Perfect for home networking and connectivity needs, the TaoTronics Bluetooth transmitter is a convenient and versatile solution for enhancing your audio experience.