Features: VCC, TX, RX can all be switched to 5V/3.3V/2.5V/1.8V The DC5.5-2.1 interface can provide high current to power external devices All four UARTs have a TX/RX indicator to display status The four serial ports use the XH2.54 interface FT4232HL's excellent performance makes it highly suitable for industrial applications with demanding requirements. It enables simultaneous communication via a single USB extension, providing 4 independent UART serial ports without mutual interference. Your computer will recognize 4 COM ports, offering a maximum communication speed of 12Mbps. Material: PC+Metal Color: As shown Package Contents: 1 x USB to TTL 4-way module Only the above package contents are included; other products are not. Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the real item. The allowed measurement error is +/- 1-3 cm.