total categories
-CCTV Camera
|-OSD Camera
|-Wide Dynamic View Camera
|-Standard Camera
|-Day Night ICR Camera
|-IR Camera
|-Vandal-Proof Camera
|-Outdoor camera
|-Vehicle Plate capture Camera
|-Hidden Camera
|-Mini Camera
|-Speed Dome camera
|-Car Rear-View Camera
|-IP Camera
|-Wireless IP Camera
-DVR
|-Digital Video Recorder
|-DVR Card
-Wireless transmitter receiver
-Mobile Phone Jammer
-Bracket and accessories
