USB 2.0 to 4 Ports RS232 DB9 9pin COM Port Adapter Hub — Serial Multiplier & Controller

Converts a single USB 2.0 connection into four RS232 COM ports via DB9 9pin connectors. Serves as a serial multiplier, adapter and controller (RS-232 hub) to provide 4 separate COM ports. Includes USB 2.0 plug interface for connection to host devices.