- USB to RS232 Cable Fully compatible with USB (Universal Serial Bus) VER: 1.1 Support for RS-232 interface Serial transmission speed up to 1Mbps Support automatic handshake agreement Support remote wake-up and power management With USB Direct power supply, do not need additional power supply Wires: 1.5 meters long, with magnetic ring filtering, anti-interference, with shielding function, 64-pin.