The Edge series incorporates many customer suggestions, including "Pipe Through" security which enables the user to pass a python cable directly through the main housing, also added was a password protection, new programming menu, and simple controls, elastic attachment belt, camera leveling system, time lapse photography, date/time/temp/moon phase stamp, selectable timer switch--day only/night only/24 hrs, small/affordable/adaptable external battery source, 5 MP color CMOS, adjustable picture resolution: 8MP, 5MP, 3MP (only on ES3.1), 50' infrared flash, up to 32GB SD/SDHC card, takes pictures or video, video resolution 640X480 (3.1 ES 320x240), ES8.1TL has Time Lapse mode (30 sec.--24hr. interval), 1.2 sec. trigger speed, 1 sec. to 60 min. interval, photo burst: 1 to 3 images, adjustable PIR sensitivity (low/med/high), 5.9"X3.7"X2.5" in size, operates on 4 batteries.