A:Answer Any input type of the 3 possible work independently of each other. RCA (actually a 3.5mm standard headphone jack with mic input) can be use completely unpowered, or you can use the USB cable directly pluged in with a PC/MAC, which results in the highest definition sound possible and charges the headset, or you can use the provided Wireless USB dongle in wireless mode. They all work independently. To note, you can switch seamlessly with a PC between wireless and wired mode (to charge it) without skipping a beat.