The Cobra AirWave™ receiver connects to stereo equipment via cabling options that include 3.5mm to 3.5mm (headphone jack) cable and 3.5mm to RCA cable. To recharge the built-in battery of the Cobra AirWave™ we have also provided a USB to micro-USB. The user pairs their media device to the Cobra AirWave™ unit, which acts as a wireless bridge allowing the user to transmit audio via Bluetooth® to older home or car stereo systems. This wireless connection offers users the freedom to be away from the stereo and control their music from up to 30 feet away.The Cobra AirWave™ can be powered by standard USB outlets or through the built-in Lion polymer rechargeable battery, which supports an impressive ten to twelve hours of music playback. Now, users can combine the compatibility and convenience of today's Bluetooth®-enabled digital music players with their investment in existing stereo systems at a small fraction of the cost of newer systems.