ITEM NAME:2Pcs DB 9 Pin Male Female Connector Serial 2 Port RS232 Data Sharing Switch Description: - Suitable for 2-way computer RS232 interface switching, 2 In 1 Out - Manual Share Switch Box: No need to unplug and plug in wires when changing from different serial devices such as printers, computers. - DB9 pin Serial Port: It's suitable for DB9 pin port devices - It's widely used in the securities market, education and communication field. - Metal house makes the switch box with good heat dissipation. - Switching mode: panel button switching Package Included: 2Pcs DB9 Pin Serial Manual Data Switch Box.Suitable for 2-way computer RS232 interface switching, 2 In 1 Out. - Switching mode: panel button switching. 2Pcs DB9 Pin Serial Manual Data Switch Box. - DB9 pin Serial Port: It's suitable for DB9 pin port devices.