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[Powerful compatibility]--Easy communication with any microcontroller. [Quality raw materials]--This high quality 4x3 Keypad lets you quickly add controls to your electronics projects. It offers 0-9 numerals, standard star(*) and hash(#) symbols. [MCU External Keypad]--These are great keyboard modules that are used for single chip microcontroller.100% brand new and high quality. [Compact design]--Small size, save space, convenient to use and connect. [After sales guarantee]--We aim to provide our customers with good value and practical keyboard accessories, should you have any questions about this keyboard module, please contact us directly.