Recessed Alarm Contacts Door Window Magnetic Reed Switch White
<ul><li><span style="background-color:#ff0000;">Switch Type: NO(normal open type), circuit is connected when magnet is near the switch.</span></li><li>The reed switch is an electrical switch operated by an applied magnetic field.</li><li>Designed for use with alarm systems. Great for use in family and factory window, door. etc.</li><li>Easy to install.</li></ul>