Universal, simple numeric keypad with 4 keys. It can be mounted on any surface using double-sided tape mounted on the bottom of the keypad. Product features and specifications Self-adhesive numeric membrane keypad - 4 keys Equipped with numbers: 1, 2, 3, 4 There is a self-adhesive tape on the back of the keyboard for easy installation. It can be used as a data input device in projects based on any microcontroller systems Application for breadboards, Arduino projects etc. working temperature 0-60 * C 4 keys Output for goldpin header with pin pitch of 2.54 cable strip length 87mm maximum voltage 35V, 100mA key connection layout - 1x4 lifetime of switching - 1,000,000 dimensions: 69x20x1 mm [width x length x thickness] application: Arduino, Raspberry, AVR, own projects. AVR, own projects. https://elecena.pl/product/22617787/1x4-self-adhesive-membrane-numeric-keypad-arduino 2023-02-22 https://elecena.pl/product/22617787/1x4-self-adhesive-membrane-numeric-keypad-arduino 2025-10-29