Supports 3.3V/5V dual power output Supports USB to TTL serial port function Supports RISC-V chip single/dual-wire download and debugging Support with SWD/JTAG interface ARM MCU download and debugging Supports automatic firmware detection and upgrade Can be used for RISC-V architecture MCU online debugging and download, can also be used for ARM MCU with SWD/JTAG interface online debugging and download. At the same time with one serial port, convenient debugging output. 3.3V/5V output power is controllable Automatic power off protection function Red and blue LED indicator light, easy to check the working status Supports one-key switch of working mode of upper computer Colour: Green Material: PCB+Plastic+Metal Package Contents: 2 x WCH LinkE Online Download Debugger Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.