2X12mm Big Key Module Big Button Module Light Touch Switch Module with Hat High Level Output for Arduino or Raspberry Pi 3 - China Sensor Module, Big Key Module | Made-in-China.com
KY-021 Mini Magnetic Reed Switch Module - ArduinoModulesInfo
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Amazon.com: 5pcs 12X12MM Big Key Module Big Button Module Light Touch Switch Module with hat High Level Output for arduino or Raspberry pi 3 : Electronics