Vivitar DIGITAL HELMET DVR 480 - Manual (Page 14)

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Technical Specifications
Image Sensor CMOS Sensor
Video Resolution VGA (640X480) / QVGA (320X240)
File Format AVI
External Memory External - SD and MMC card compatible (up to 16GB)
LCD Display Illumination: 100-16000 (lux)
Lens F=3.0 f=3.6
Shutter Speed Electronic shutter 1/2-1/2000 s
Focus Range 1.5M to infinity
Interface USB 2.0
System Requirements
Windows XP (SP3), Vista (SP1) or 7
Mac OSX v10.5.x and above
Battery 2 x AA batteries (Alkaline batteries recommended.)