Warranty: Lifetime Converts back and forth between DB9 Female Plug and 4 DB9 Serial Ports Switch between 4 DB9 serial devices Plug and play Easy to use and the rotary switch is located on the front of the unit This rotary unit will switch between 4 DB9 serial devices. This box is plug and play and is easy to use, the rotary switch is located on the front of the unit.
