Uark 7 Series Mini Bluetooth 4.0 Music Receiver Noise Filter Audio Car Kit Home Sound Streaming Wireless Adaptor Hands-Free Dongle A2DP Stereo Transmitter with 3.5mm AUX Output and USB Charger (Red) Hands-free Bluetooth wireless speakers that allow for answering and receiving phone calls and streaming music Unique electromagnetic noise-filtering technology removes car power noise issue Connect 2 Bluetooth devices at the same time with over length receiving distance; latest Bluetooth 4.0 technology offers range up to 33 feet; automatic re-connection up to 8 memorized devices Easily adapts via A/V, RCA, and 3.5mm jack input for home theaters, stereo systems, and car stereos; support SBC, AAC & MP3 compression formats Comes with a Bluetooth receiver, a 20-inch connector extension (1/8" 3.5mm female AUX to RCA male), and a user manual