Wholesale 1/4 Inch CCD Motion Detection Wall SD Card DVR - IR Light with 128MB Internal Memory, DC 5V or built in rechargeable Li-ion battery from China.
Knowledge of security DVR
DVR that is, Digital Video Recorder (also known as: Personal video recorder or PVR) - digital video recorders or digital hard disk video recorder, we are used to known as the hard disk recorder.
It is a PC for image storage and processing system, with the image / voice for a long time video, audio, remote monitoring and control functions, DVR set the VCR, Quad, PTZ camera control, alarm control, network transmission 5 kinds of functions such as one, with a piece of equipment will be able to replace the analog control system features a host of devices, but there is increasing in price advantage.
DVR is a digital recording technology used in image processing, image storage, retrieval, backup, and network transmission, remote control, it is also far superior to analog surveillance equipment, DVR represents the development direction of TV monitoring system, is currently on the market TV monitoring system, the product of choice. China Manufacturer SpecificationsMemory:
- Internal: 128MB
- External: SD card (max. 1GB) Horizontal Definition: 420 TV Line Image Device: Wide angle 1/4 inch CCD Angular Field of View: 120 deg S/N Ratio:
