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3*4 4*4 Matrix Switch Keyboard Keypad Array Module ABS Plastic Keys 4x4 3x4 12 16 Key Button Membrane Switch DIY Kit for Arduino - AliExpress
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Amazon.com: MCU Keyboard, 3x4 Keyboard with Standard Star(x) and Hash(#) Symbols, Keyboard Module with 12 Keys, SingleHanded Keypad, Suitable for Game Lovers : Electronics
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Amazon.com: MCU Keyboard, 3x4 Keyboard with Standard Star(x) and Hash(#) Symbols, Keyboard Module with 12 Keys, SingleHanded Keypad, Suitable for Game Lovers : Electronics
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text input - 3x4 keypad only types numbers even when in the letter mode is shown - Android Enthusiasts Stack Exchange
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