The iKN150 is a Bluetooth-enabled wireless stereo system with built-in speakerphone capability. Built-in NFC (near field communications) technology allows for instant Bluetooth connections from NFC-capable devices. Built-in rechargeable battery provides power on the go. Pop out removable battery with USB port to charge devices or extend portable operation. Stream wireless digital stereo audio via Bluetooth from your iPhone, iPad, Android, Windows-most Bluetooth devices. Reson8 speaker enclosure plus Texas Instruments DSP for full, rich sound. Built-in mic, digital voice echo cancellation and answer and end controls make speakerphone use a pleasure. Aux-in jack for playing almost any audio device.