Features: It can monitor all JTAG signals, automatically adapt to target board voltage and also can be achieved in RDI under FLASH programming with RDI Flash DLL,can be achieved in the GDB debugging environment with GDB Server Supports all ARM chips, PIC chips, RISC-v chips, and some 51 chips. The VREF defult output is 3.3V, if the VREF need to input ,you can disconnect the jumper. Able virtual COM-Port by inputting "VCOM enable"in J-Link Commander. Note:Due to different product batches, the appearance may be different, which does not affect use. The color of the board and wiring harness is random and cannot be specified. Material: plastic colour: black Package Contents: 1 x Jlink V12 Emulator 1 x 20P Line of a Standard JTAG 1 x USB cable 1 x Multi-function adapter board 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.