Black Box Opto-Isolator - serial adapter - USB - RS-232 x 1 + USB 2.0 x 1 - TAA Compliant

Connect an RS-232 device to a USB port and gain isolation from voltage spikes and ground loops. This compact opto-isolator enables you to attach an RS-232 device to a USB port and gain isolation from voltage spikes and ground loops. It doesn't require PCI or ISA slots or IRQs. Using an optional USB Type A- Type B cable simply plug the opto-isolator into the USB port and Windows will configure the device as an additional COM port.