Specification: Origin: Mainland China Description: The MPR121 Capacitive Keypad uses the MPR121 and 12 touch sensing pads to give you a simple "keyboard" with I2C output. The board also has four mounting holes that allow it to be used as an input system in place of traditional buttons. Check out the example code below for a simple way to read the keyboard. cjmcu. Product Size: 78.00x48.00x5.00mm/3.07x1.89x0.2inch Material: Mixed Material Note: This keyboard outputs 3.3V logic. If the board you are using only accepts 5V logic, you will have problems. You will need to use a logic level converter or a board that accepts 3.3V logic. 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! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1 x MPR121 Capacitive Touch Sensor Module 1.High Sensitivity and Multi-touch Detection: The MPR121 capacitive touch sensor module utilizes advanced capacitive touch detection technology, enabling highly sensitive and accurate touch detection. It supports multi-touch detection, allowing simultaneous tracking of multiple touch inputs, providing a seamless user experience. 2.Low Power Design: The MPR121 3x4 buttons keys keyboard is designed with energy efficiency in mind, consuming minimal power while still delivering reliable touch detection capabilities. This low power design ensures prolonged battery life and reduces energy consumption in touch-enabled devices. 3.Strong Interference Resistance: The MPR121 capacitive touch keypad boasts excellent interference resistance, effectively filtering out external noise and interference signals. This robust resistance ensures reliable and consistent touch detection, even in noisy environments or in the presence of electromagnetic interference. 4.Flexibility and Expandability: The MPR121 shield sensitive key keyboard module offers great flexibility and expandability, making it compatible with a wide range of microcontrollers and processors. This versatility allows for seamless integration into various applications and systems, making it an ideal choice for developers and designers. 5.Simplified Development: The MPR121 12 buttons sensor module provides a rich set of software libraries and development tools, streamlining the application development process. This simplification saves time and effort for developers, enabling them to quickly prototype and deploy touch-enabled applications.