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. Manufacturer: Black Box Corporation. Manufacturer Part Number: SP385A-R3. Brand Name: Black Box. Product Model: SP385A-R3. Product Name: USB to RS232 Opto-Isolated Converter. Packaged Quantity: 1. Product Type: Transceiver/Media Converter. [Interfaces/Ports] Total Number of Ports: 2. USB: Yes. [Power Description] Power Source: USB. [Physical Characteristics] Height: 0. 8". Width: 1. 7". Depth: 3". Weight (Approximate): 6. 40 oz. [Miscellaneous] Package Contents: USB to RS232 Opto-Isolated Converter 1 x USB Cable (3-ft. ) Drivers on CD Quick Start Guide . : Yes. Environmental Certification: RoHS. WEEE. Country of Origin: United States. TAA Compliant: Yes. [ ] Limited : 5 Year.