Aluminum Rolling Magnetic Sensor Alarm Door Security System

DC - Direct Current

Alarm - A device which emits a sound at a pre-set time/event

magnetic - A susbstance affected at a microscopic level by an applied magnetic field.

Office - A room where people work

Home - A place of permanent residence for families.

Voltage - A measurement of volts.

Convenient - Something that suits and fits well to other activities.

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