Specifications

This module consists of a small reed switch actuated by a magnetic field, a 10kΩ resistor, and 3 male header pins.

Operating Voltage	3.3V ~ 5V
Output Type	Digital
Board Size	18.5mm x 15mm [0.728in x 0.591in]

Documentation

• KY-021 Mini Magnetic Reed Switch Module - ArduinoModulesInfo