This 2-pack ARM SWD programmer and simulation debugger is compatible with STM32 and features V8 firmware for high-speed performance. It supports both programming and simulation, allowing you to burn FLASH ROM, EEPROM, AFR, and more, while enabling full-speed running, single-step, breakpoint debugging, and real-time monitoring of IO status and variables. Key Features: - Simple 4-Line SWD Interface: Uses only VCC, SWDIO, SWCLK, and GND for fast downloading and simulation. - Fully Compatible with V8 Simulator: Works like the traditional V8 debugger with all functions. - Universal Micro-USB Port: Easily connect using a common Android phone cable. - 3.3V Power Output: Supplies up to 300mA to power your target board during debugging. - Built-in Safety Protection: Includes self-recovery fuse and ESD protection for stable operation. - Reliable & Upgradable Firmware: Stable performance with automatic updates to minimize risk. - Compact & Portable: U-disk sized, easy to carry for work or travel. Specifications: - Color: As shown in images - Material: Plastic + Metal - Package Includes: 2 x Emulation Debuggers Only the listed items are included. Slight color variations may occur due to lighting and screen differences. Measurements may have a tolerance of +/- 1–3 cm.