Camera design

•  Box (1)
•  Bullet (3)
•  Cube (1)
•  Dome (3)

Pixel Resolution

•  2 - 4 MP (5)
•  4 - 8 MP (18)
•  More than 8 MP (3)

Microphone

•  Built-in (2)
•  Other (5)

Environment

•  Indoor (2)
•  Outdoor (3)

SD card support

•  No (2)
•  Yes (3)