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Hikvision''s DS-2TD4137-25/W Thermal and Optical Bi-Spectrum Network Speed Dome is equipped with a built-in GPU that supports an intelligent behavior analysis algorithm. It can realize high-precision VCA detection and realtime alarms. It is used for perimeter defense and fire-prevention in critical infrastructures such as railways, airports, parking lots, factories, etc. The pre-alarm system helps you discover unexpected events immediately and protects your property.