Regetek 2-in-1 Bluetooth Transmitter Receiver A2DP Car Home Music Stereo Audio Adapter Dongle With 3.5mm Stereo Output for Speakers, Headphone, TV, PC, iPod, MP3 / MP4, Car Stereo and More 2-In-1 Bluetooth Transmitter & Receiver:turn all 3.5mm media devices to be bluetooth-enabled audio Device to enjoy wireless music and sounds. Simple one-button switch to shift between transmitter(TX) and receiver(RX) mode. TX Mode:Plug In To Your Non-Bluetooth Device And Pair Up Your Bluetooth Speaker Or Headset. RX Mode: Plug Into Your Non-Bluetooth Speaker And Pair Up Your Bluetooth Phone Or MP3 Player. Convenient. Bluetooth Receiver: pair with any speakers, headphones, TV Ears, stereo system to bluetooth enabled; Bluetooth Transmitter:add wireless function to MP3, CD / DVD players, e-readers,PC, TVs and more. Built in battery for portable use, or connect to a USB power source for always-on application. Ideal For Any Powered Speakers Or Devices Using Standard RCA Or 3.5mm Jack Or AD2P Bluetooth.