Great sound, far better than the sound unit it replaced..much clearer..only problem is the Bluetooth is out of synch with the screen and we have to change the volume with the Samsung changer as it doesn’t link with the LG tv changer..however maybe it’s me?! Doesn’t have a port for a HDMI cable so you have to use an optical cable. The USB port I believe is only to link an external device such as a phone to play music?