Aten IC485S RS-232 to RS-485/RS-422 Bidirectional Converter Type: Serial Ports: 1 DB-25 Female (RS-232), RS-485 / RS-422 Four Terminal Block, RJ-11 Transfer Rate: Up to 100 Kbps under 1200m Power Input: DC9V Dimensions: 3.2 x 2.2 x 0.8 Package Contents: 1 x IC485S bi-directional isolated converter 1 x Power adapter 1 x User manual 1 x Warranty registration card Parts: 1 year limited Labor: 1 year limited