QMseller Recessed Security Alarm Contacts Door Window Sensor Magnetic Reed Switch White 4Pcs cocoon CONFORTABLE WEAR FEELINGNylon braided lanyard

CONFORTABLE WEAR FEELINGNylon braided lanyard is soft

stack and count using the Skoolzy pegboard set

Designed to fit wrists 5

Feature: 52 x 26 mm color LCD screen

QMseller Recessed Security Alarm Contacts Door Window Sensor Magnetic Reed Switch White 4Pcs cocoon CONFORTABLE WEAR FEELINGNylon braided lanyardQMseller 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