LANMU Bluetooth Wireless 2-in-1 Transmitter and Receiver Portable Switchable Acceptor with 3.5mm Stereo Output for PC, Iphone, Ipod, Ipad,TV When it worked as a bluetooh transmitter,the unit could make your regular stereo regular audio devices into bluetooh-enabled. When it worked as a bluetooh receiver,it adds bluetooh receiving capability to your headphones,home stereo. Energy saving core, the circuit optimization line,Save each link loss, low power output. Using the latest hd lossless transmission techniques, let the bluetooth devices clear fidelity to each other. Easily upgrade the wireless bluetooth audio devices, intelligent matching connected TVS, PS3, desktop, tablet PC, MP3.