1、FUNCTION: Expanding a single USB to 4 UART serial ports, this serial port module can achieve simultaneous communication. 2、4 WAY TTL PORT: All the 4 serial ports are using XH2.54 port, and the 4 way UART all have TX or RX indicator to show statue. 3、EASY SWITCHING: VCC, TX and RX can switch among 5V, 3.3V, 2.5V and 1.8V, and the switching is very quick and easy as well. 4、WIDE APPLICATION: Allows for flexible application on electronic equipments and automation equipments, powerful and useful. 5、GOOD WORKMANSHIP: Adopting excellent workmanship, the serial port module is not prone to cold joints, simple to install.<p class="wang-edit-text"><p class="wang-edit-text">Item Type: Serial Port ModuleMaterial: Printed Circuit BoardWorking Voltage: DC 5V (USB power supply)Function: To achieve simultaneous communication with a single USB to expand 4 UART serial ports.&nbsp;Applicable Scenarios: For electronic equipment, automation equipment.&nbsp;<style> .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }</style>1 x Serial Port Module