--- product_id: 462850269 title: "4 x 3 Matrix Array 12 Switch Keypad Keyboard Module 12 Key MCU Membrane Switch Keypad Compatible with Arduino" brand: "haljia" price: "S/.158" currency: PEN in_stock: true url: https://www.desertcart.pe/products/462850269-4-x-3-matrix-array-12-switch-keypad-keyboard-module store_origin: PE region: Peru --- # Plug & play Compact design 12 keys 4 x 3 Matrix Array 12 Switch Keypad Keyboard Module 12 Key MCU Membrane Switch Keypad Compatible with Arduino **Brand:** haljia **Price:** S/.158 **Availability:** βœ… In Stock ## Summary > πŸ”Œ Plug into innovation with HALJIA! ## Quick Answers - **What is this?** 4 x 3 Matrix Array 12 Switch Keypad Keyboard Module 12 Key MCU Membrane Switch Keypad Compatible with Arduino by haljia - **How much does it cost?** S/.158 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/products/462850269-4-x-3-matrix-array-12-switch-keypad-keyboard-module) ## Best For - haljia enthusiasts ## Why This Product - Trusted haljia brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Durable Build:** Crafted from high-quality plastic and metal for long-lasting use. - β€’ **User-Friendly:** No wire splicing neededβ€”just plug and play! - β€’ **Compact Convenience:** Small size fits perfectly in any project without bulk. - β€’ **Seamless Integration:** Easily connects with Arduino and other microcontrollers. - β€’ **Versatile Applications:** Ideal for alarm systems, access control, and more. ## Overview The HALJIA 4 x 3 Matrix Array Keypad Module features a durable 12-key design, compatible with Arduino and other microcontrollers, making it an essential tool for electronic projects. Its compact size and easy installation process ensure that it fits seamlessly into various applications, from security systems to device control. ## Description 4 x 3 Matrix Array 12 Switch Keypad Keyboard Module 12 Key MCU Membrane Switch Keypad Compatible with Arduino ## Features - The 4x3 -12 Switch matrix keyboard module is made by high quality plastic and metal material which is very durable and reliable. - It provides 0 to 9 numbers, as well as standard stars (*) and hash(#) symbols. - Keyboard matrix allows you to quickly add controls to your electronic project. Direct replacement, a simple plug and play with no wire splicing. - Easy to communicate with any microcontroller. This module is compatibile with microcontrollers such as AVR and PIC which makes it a perfect choice for your Arduino applications and projects. - Its small size and compact design make this switch more convenient in module alarm/safety device operation, access control, and device control. ## Technical Specifications | Specification | Value | |---------------|-------| | Brand | HALJIA | | Product Dimensions | 6.95 x 5.1 x 1 cm; 10 g | | Manufacturer reference | ADN2006037 | | Manufacturer | HALJIA | | Color | ice | | Power Source | USB power | | Operating System | Windows 10 | | Are Batteries Included | No | | Item Weight | 10 g | ## Product Details - **Brand:** HALJIA - **Compatible devices:** Laptop - **Connectivity technology:** RF, Wired - **Keyboard description:** Membrane - **Recommended uses for product:** Alarm system control, Access control, Device control ## Images ![4 x 3 Matrix Array 12 Switch Keypad Keyboard Module 12 Key MCU Membrane Switch Keypad Compatible with Arduino - Image 1](https://m.media-amazon.com/images/I/71svmWwBV2L.jpg) ![4 x 3 Matrix Array 12 Switch Keypad Keyboard Module 12 Key MCU Membrane Switch Keypad Compatible with Arduino - Image 2](https://m.media-amazon.com/images/I/71QbbSgFS2L.jpg) ![4 x 3 Matrix Array 12 Switch Keypad Keyboard Module 12 Key MCU Membrane Switch Keypad Compatible with Arduino - Image 3](https://m.media-amazon.com/images/I/71Ls3vNFShL.jpg) ![4 x 3 Matrix Array 12 Switch Keypad Keyboard Module 12 Key MCU Membrane Switch Keypad Compatible with Arduino - Image 4](https://m.media-amazon.com/images/I/61ITJ5zP0HL.jpg) ![4 x 3 Matrix Array 12 Switch Keypad Keyboard Module 12 Key MCU Membrane Switch Keypad Compatible with Arduino - Image 5](https://m.media-amazon.com/images/I/71+XIM-t2zL.jpg) ## Frequently Bought Together - HALJIA 4 x 3 Matrix Array 12 Switch Keypad Keyboard Module 12 Key MCU Membrane Switch Keypad Compatible with Arduino - AZDelivery LOLIN32 Lite V1.0 ESP-32 Rev1 WiFi Bluetooth Board 4MB Flash 500mA CH340 CH340G Lithium Battery Connector ESP32 compatible with Arduino Including E-Book! --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pe/products/462850269-4-x-3-matrix-array-12-switch-keypad-keyboard-module](https://www.desertcart.pe/products/462850269-4-x-3-matrix-array-12-switch-keypad-keyboard-module) --- *Product available on Desertcart Peru* *Store origin: PE* *Last updated: 2026-04-30*