here!
I’m your shopping assistant for PC builds, upgrades, and everything tech.
Got questions? Ask away!
Start a conversationAny questions? Ask CelesteSM will help you find out quickly.
Multi-port RS-232 card
Automatic RTS/CTS or DTR/DSR hardware flow control with programmable hysteresis
Automatic Xon/Xoff software flow control
RS-232 half duplex direction control output with programmable turn-around delay