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Autonomous door-window alarm, loud siren, easy programming of four-digit code,
when the alarm is not armed it can also operate your door opening alarm.
It works with a simple 9V battery. NOT INCLUDED IN THE PACKAGE

Sensor Kit, 3D Printer Parts Filament Detection Device Sensor Kit for Creality Ender 3 V2, Ender-3/Pro, Max, Ender-6, CR-10S Pro/V2, CR-10 V2/V3