Firefly Bluetooth Receiver: World&rsquo;s Smallest Wireless Audio Bluetooth 4.2 Adapter with 3.5mm AUX for Car/Home Stereo Music Streaming; Auto On, No Charging Needed - Premium Pack (Red) SIMPLE & EFFECTIVE: Transforms your home stereo and car audio sound systems into wireless and Bluetooth compatible speakers with just one, easy-to-use plug. No charging needed! Firefly automatically switches on when you start your engine or turn on your speaker. GREAT SOUND QUALITY: Crystal clear AAC/MP3 audio or your money back! NO annoying voice prompts telling you it's connected AUTOMATICALLY RECONNECT & DUAL CONNECTION: Remembers up to 8 paired devices so you can connect as soon as Bluetooth is switched on - auto-connects to the last device used. DUAL CONNECTION SEAMLESS SHARING: Can pair up to 2 devices at the same time to make music sharing even easier. CONVENIENT COMPACT DESIGN: Keep your audio system looking sleek thanks to its compact and stylish design. (USB charger not included)