New 9 PIN RS-232 to RS-485 Adapter Interface Converter Connector Data Transfer Rate: 300-115200bps Operating Distance: 1200m for RS485, 5m for RS232 Power: None required, uses TD as power source Environment: -10C to 85C, 5% to 95% RH Interface: Compatible with EIA/TIA RS-232C standard and RS-485 standard