1、Practical Use: Adopts PL2303, supports 8V, 5V, 3V, 5V logic level, also has USB Type A interface. 2、Easy Setting: By changing the jumper caps, you can easily set 3 different VCCIO power supply modes. 3、Good Matching: Supports various operating systems, including for windows XP, 7, 8, 10, very reliable. 4、On Board LEDs: Equipped with 3pcs LED indicators on board, TXD, RXD, PWR, simplifying the operation. 5、Simple to Use: With a light weight and a small size, very easy to install, ideal for DIY production. 1 x USB to UART Serial Adapter1 x Jumper Wire Item Type: USB to UART Serial Adapter Material: PCBApplication: For DIY production. VCCIO 3 Power Supply Methods:VCCIO 5V: 5V external power supply; VCCIO 3.3V: 3.3V external power supply; Without Jumper Caps: Powered by external ( 1.8V, 2.5V, 3.3V, 5V). LED Indicator: TXD, RXD, PWRSupport System: For windows XP, 7, 8, 10.