<p>Support devices with RS485 interface: surveillance cameras, video capture device, video capture device, video fingerprint attendance machine, PBX, CNC machine, microcontroller, etc. This converter provides two channels of serial communication signal. Self-powered by USB Standard: USB2.0 standard, backward compatible, in line with RS485 standard Dimension: 71 x 18 x 16 mm/7.1 x 1.8 x 1.6 cm (W x D x H) Note: The color of the item may vary slightly due to photography and your own computer Feature: Support windows98/ME/2000/XP/Win7/Vista, Linux, Mac Support devices with RS485 interface: surveillance cameras, video capture device, fingerprint attendance machine, PBX, CNC machine, microcontroller, etc. This converter provides two channels of serial communication signal Conversion between RS485 PC to and from a USB port Thanks to the virtual serial COM port Self-powered by USB Specification: Material: PCB Board, Metal Color: Black &amp; Green Standard: USB2.0 standard, backward compatible, in line with RS485 standard Direction control: use automatic flow control data, automatic data transfer control distinguish and direction baud: 300&ndash;9216000bps, automatically signal detection Serial Data Rate Load Capacity: Support multi-point, each converter allows RS485 interface device to connect 32 Interface Protection: TV tube protection, USB self-recovery Protection Dimension: 71 x 18 x 16 mm/7.1 x 1.8 x 1.6 cm (W x D x H) Weight: 14 g Package Contents: 1 x USB to RS485 TTL Serial Converter Adapter</p>