Seeed 101020003 Grove Button with Momentary Action & Pull Down Res...

Seeed-Studio-Grove-Button-with-Momentary-Action-and-Pull-Down-Resistor-Seeed-Studio-101020003-From-the-Grove-modular-connector-prototyping-system-is-the-b-Grove-Button-b-The-momentary-push-button-outputs-a-HIGH-when-pressed-and-a-LOW-when-released-p-Seeed-101020003-Grove-Button-with-Momentary-Action-Pull-Down-Resistor

Price: 1.85 from Rapid Online Rapid Electronics Ltd.