Check the listing for details. 5pcs KY-004 KY04 KY004 3 Pin Button Key Switch Sensor Module Shield for Arduino. Condition: New. Listed at 8.79 USD. Shop by Category Hardware CNC & 3D Printing Automation & Linear Motion Pneumatics Embedded Development Electronics Camera Mounts Tools Other Why Shop With Us 5pcs KY-004 KY04 KY004 3 Pin Button Key Switch Sensor Module Shield for Arduino Product Description *** 5 Pack *** Simple button input module popular for use with Arduino (and ESP8266, ESP32, STM32, etc) projects Only 3 wires to connect. Connections: - (GND)Center (+5V)S (Signal - connect to digital input pin) eBay will no longer allow us to include links - please search for "Arduino KY-004 Button" for lots of examples including code to get you up and running in no time. Please consider taking advantage of our multi-item discount found at the top of the listing page; it allows us to combine shipping and pass on the savings to you. 10% off 3, 15% off 5 items. Applies to most of our items. FREE Shipping to the USA and APO Addresses Related Items Details about Assortment A Imperial SAE Metal Threaded Heat Set Screw Inserts 3D Printing Kit Please consider taking advantage of our multi-item discount found at the top of the listing page; it allows us to combine shipping and pass on the savings to you. 10% off 3, 15% off 5 items. Applies to most of our items. FREE Shipping to the USA and APO Addresses --> © 2018 Albers LLC. All Rights Reserved.