Specification: _x005f_x000D_ Origin: Mainland China _x005f_x000D_ Compatible Brand/Model: None _x005f_x000D_ color: blue _x005f_x000D_ Dimensions: 37mm x 32mm _x005f_x000D_ Package includes: 1 x Matrix 8-key keyboard module _x005f_x000D_ Product size: 37.00x32.00x5.00mm _x005f_x000D_ Product size: 1.46x1.26x0.2inch _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Note: _x005f_x000D_ Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! _x005f_x000D_ Please allow 1-2cm measuring deviation due to manual measurement. _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Included: _x005f_x000D_ 1 x Matrix 8-key keyboard module 1. Compact Size: The 2x4 keypad is designed with a compact form factor, making it an ideal choice for projects where space is at a premium. Its small size does not compromise functionality, offering a practical and efficient solution for various applications. 2. Space-Saving Design: With the 4x2 keypad's space-saving design, users can easily integrate it into their projects without worrying about the bulk. This feature is especially beneficial for designers and hobbyists looking to maintain a sleek and minimalistic setup. 3. User-Friendly Operation: The 8 push buttons on the keyboard matrix make it more convenient to use, providing a straightforward interface for inputting commands or data. This enhanced usability is perfect for both beginners and experienced users, ensuring smooth operation across different projects. 4. Ideal for MCU Expansion: The 2*4 module serves as an excellent external expansion keyboard for microcontroller units (MCUs) like Compatible Arduino, AVR, PIC, etc. It allows for easy and efficient control of various functions, making it a versatile tool for developers looking to enhance their projects. 5. Versatile Application: The 2*4 matrix keyboard button is not just limited to basic input tasks; it's also suitable for more complex projects requiring external input. Whether you're working on a DIY electronics project or developing a prototype, this mcu external expansion keyboard module offers the flexibility and reliability needed to bring your ideas to life.