ALLNET 4duino magnetic reed sensor for Smart CarSmart Car KY-021 DH Mini Magnetic Reed Modules For Arduino Product Description
Mini magnetic reed KY-021 100% Brand new and high quality Sensor module Provide the highest possible performance < reliability Fixing bolt holes Material: PCB Working Voltage: 3.3V-5V Can be used with duplicator, refrigerator, camera, water < gas meter. Compatible with standard 2.54mm pins