Magnasonic Portable Wireless Bluetooth Music Receiver Adapter for Speaker Systems & Car Audio with 3.5 mm AUX Connection & Rechargeable Battery for Streaming Smartphones, Tablets, Laptops (BA21) Wirelessly stream crystal clear music instantly from your smartphone, tablet, or any of the other 900 million Bluetooth devices through your vehicle or home speaker system. Easily connect to any standard 3.5mm auxiliary input and enjoy 12 hours of continuous music playback time with the built-in rechargeable battery (convenient micro USB charging) Automatically pair to Bluetooth as well as control your music with play, pause or skip track with the touch of a button. Voice prompt alerts when power turned on/off, low battery, connection status Superior wireless connectivity; reliably listen to music through your speaker systems without worrying about interference or wiring/docking your smartphone Quick and easy plug n play; connect to your music system, wirelessly pair your audio device, and youre set. No software or app required