This is a USB to RS485 converter, which can be used to control RS485 bus devices such as PTZ PTZ cameras, PLC relays, etc. The driver chip is CH340E, and the RS485 bus chip is SP485 industrial grade. Supports the following OSes: Windows 98SE Windows ME Windows 2000 SP4 Windows XP SP2 and above (32 & 64 bit) Windows Server 2003 (32 & 64 bit) Windows Server 2008 / 2008 R2 (32 & 64 bit) Windows Vista (32 & 64 bit) Windows 7 (32 & 64 bit) Windows 8 Windows 8.1 Windows 10 for Linux OS ​for MAC OS Colour: green Material: PCB+plastic+metal Package Contents: 1 * SP485 USB to RS485 Converter Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.