The Ikn100 Is A Bluetooth-Enabled Wireless Stereo System With Built-In Speakerphone Capability. Built-In Nfc (Near Fi Eld 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 V