CCTV Sekolah & Kampus Purworejo – Pantau Aktivitas Siswa

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In this video i will show you how to wire cctv dvr system step by step with details thanks for watching.
CCTV works by the camera or cameras taking a constant sequence of images that are then transmitted by cable or wirelessly (depending on the chosen system type) to the recording device and then on to the display monitor, which enables an individual to see the sequence of images as video footage.
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