LKE Sound Bar Plug & Play any media device using AUX/Optical/Bluetooth connection Wireless karaoke fun with no cable mess! DTS TruSurround fills the room with realistic, immersive audio. Bluetooth aptX technology allows for wireless streaming without loss of audio quality. Mic frequencies used = 695.7MHz/ 679.7MHz/ 660.7MHz/ 644.7MHz Unlimited karaoke library using apps like Sing! by Smule, YouTube, Karafun &amp; more!