1. Channel
4
8
9
16
32
2. Max. Resolution
5 Megapixels
6 Megapixels
8 Megapixels
10 Megapixels
12 Megapixels
3. HDD Bay
2
4
4. Max. HDD Capacity
3TB
4TB
6TB
5. Video Compression
H.264
H.265
MJPEG
MPEG4