BitWise BC4, US Power Supply, 4 IR Ports, GPIO, RS-232 Control AV equipment from your tablet via a customizable interface, providing a perfect solution for home theaters, boardrooms, restaurants, and more. The small BitWise BC4 controller is ideal for single room solutions like home theaters and conference rooms. The BC4 features 4 routable, attenuable IR ports, 2 RS-232, 2 general purpose input/output relays, and 2 digital or analog signal sensors.