StarTech STARTECH RS-232 to RS-485/422 Serial Converter Changer Type: RS-232 to RS-485/422 Specifications: Color Beige Connector Types 1 - RJ11 Female Connector Types 1 - Terminal Block Connector Types 1 - DB25 Female Product Height 0.75 in [19 mm] Product Length 2.91 in [74 mm] Output Current 300mA Output Voltage 9 DC Plug Type M Power Adapter Included Yes Power Adapter - Amperage 0.3A Power Adapter - DC Voltage DC 9 Center Tip Polarity Positive Carton Quantity 20 Shipping (Package) Weight 0.86 lb [0.39 kg] Product Width 2.13 in [54 mm] Data rate Up to 1MB/sec Cable length Up to 4000ft. RS-232 connector DB9 Female RS-485 connector RJ11 Female or 4 terminal block Dimensions (mm) 54 x 74 x 19 Power Self-powered or DC 9V 200mA Parts: 1 year limited