These speaker units can be split into two by removing the connecting hardware in the centre. Then you have 4 great installation options to suit your room. Try a horizontal layout, or a 2.1-channel vertical layout & have them wall-mounted or free standing. Music archived on your smartphone or PC can be played back via Bluetooth Wireless Technology. Enjoy clear sound with no worry about music signal interference from obstructions. The audio signal is wirelessly transmitted from the main unit to the subwoofer, eliminating troublesome wiring & restrictions on where the subwoofer can be placed for complete layout freedom. *AC power cord must be connected. By expanding the sound field in the upper front area of the TV screen, Clear-mode Dialog gives the sound greater depth. It also makes voices sound like they're coming from the centre of the screen. Dialogue volume is adjustable to 4 levels. This function is great for when dialogue is drowned out by the surround sound & is difficult to hear.