LED White 16mm Illuminated Metal Push Button Switch ky-040 A compact GSM breakout for

A compact GSM breakout for adding voice

sensor probes

Tip type C (chisel) Fits 900-series soldering irons Best for Pads

Based on the ESP8266 chip

The main uses are for connecting wirings

LED White 16mm Illuminated Metal Push Button Switch ky-040 A compact GSM breakout forThese chrome plated metal buttons are rugged and look real good while doing it! Simply drill a 16mm hole into any material up to 1 2" thick and you can fit these in place, there's even a rubber gasket to keep water out of the enclosure. On the front of the button is a flat metal actuator, surrounded by a WHITE plastic LED ring. On the back, there are 3 contacts for the button (common, normally open, and normally closed) and 2 for the WHITE LED ring (+