QMseller Recessed Security Alarm Contacts Door Window Sensor Magnetic Reed Switch White 4Pcs cocoon Here comes the music

Here comes the music

notonly entertainment

stack and count using the Skoolzy pegboard set

Used In Industries Current Monitoring -- Widely used in substation

QMseller Recessed Security Alarm Contacts Door Window Sensor Magnetic Reed Switch White 4Pcs cocoon Here comes the musicQMseller Recessed Security Alarm Contacts Door Window Sensor Magnetic Reed Switch White 4Pcs Size: NC 4pcs Switch Type: NC means Normally Closed: When the magnet together, the circuit is conductive( light on ); when the magnet separate, the circuit is not conductive ( light off ). For example: Install on the door, close door light on. open door light off. When make order, pals check carefully! The reed switch is an electrical switch operated by an