Features: Samd21 M0, 32-bit extension development board. The board is powered by samd21 microcontroller and uses a 32-bit ARM Cortex M0 core. Zero- and M0 are compatible. The samd21 M0 motherboard expands the family by providing higher performance-, realizes opportunities for various equipment projects, and serves as an educational tool for learning 32-bit application development. Intelligent net-work equipment, wear-resistant technology, high-tech automation, zero- application range of crazy robots. How to use: insert the mirco USB into the mobile phone charger, computer USB port, etc. to useOne of its important functions is embedded debugger (edbg), which provides a complete debugging interface without additional hardware, which greatly increases the ease of use of software debugging. Edbg also supports virtual COM ports that can be used for devices and Bootloader programs. Specifications: Product Size:approx 69mmx53mm/2.72x2.09in Product Name: SAMD21 M0 Development Board Product model: HW-819 Input voltage: 5V Note: Applying a voltage greater than 3.3V to any pin may cause irreversible damage to the chip. Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-2mm error due to manual measurment. Package includes: 1 Set x SAMD21 M0 Development Board