Using this FSR T2 - CARX Twister 2 A/V receiver? First, you'll need to get your own external power supply since it's not included. When connecting it to your computer, make sure to check the cable connections carefully. As for usage, simply power it on and start enjoying audio and visual content. Just a heads - up, since we couldn't test the unit, you might want to do a thorough check when you first use it. For maintenance, keep it in a dry and clean place, away from dust and moisture. Don't forget to check the cables regularly for any signs of wear and tear.