Video compression format is MPEG4, files format: AVI with a photo format of JPEG. The main unit has a high resolution LCD 2.5″ true colour screen for play back with an SD storage of up to 32GB. The Main unit has external battery capability that allows the unit to record continuously for up to 12 hours with the 16GB SD card supplied. Video format: NTSC/PAL with multi record mode in manual, auto and motion detection. Real time recording are marked in file with a time date option to document incident as they occur. Size of the main unit is 79mm x 51mm x 22mm and weighs 85 grams.