Features: The MPR121 Capacitive Touch Sensors Module features a highly sensitive 12key interfaces with 3.3V logical output, ensuring rapid response and seamless integration with modern microcontrollers for precise input control. Built with premium PCB materials and right angles pin header, this touch sensors module delivers durability and easy installation while maintaining stable performances under frequent use. Designed for developers, engineers, and electronics enthusiasts seeking reliability input Keypad in projects, devices, or educational prototyping setups. Optimize smart home control panels, industrial automation systems, or interactive educational tools with its 12 channel capacitive sensing for intuitively, modernized user interactions. Compatible for 3.3V logical microcontrollers and expandable via logical levels converters, this keyboard simplifies multifunctional control in robotics, automation, and embedded systems applications. Specifications: Component: PCB Size:Approx.48x78mm/1.88x3.07inch Features: capacitive touch sensing button, 12key;I2C Output; Output voltages:3.3V Note: This keyboard outputs 3.3V logical voltages. If you use a circuit board that only accepts 5V logical, you need to use logical levels converter or a circuit board that is compatible for 3.3V logical. Package Includes: 1pc MPR121 Touch Sensors Module 1pc Pin Header note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.