USB to RS485 Converter Adapter USB connector to your PC RS485 connector to your RS485 device No need external power, powered by USB port Fully compliant USB 2.0 standard, backward compatible with USB1.1 Material:Plastic Color: Black Size: 6.1x1.6x1.3cm Communication distance:1200m(max) Work temperature range -40Degrees Celsius ~ +85Degrees Celsius Package Included: 2 x USB to RS485 Converter 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.