A.The output must have a built-in step-up transformer

B.All of the above are true

C.Different rectification methods

D.Different bypass device types

A.True

B.False

A.4

B.3

C.5

A.-20 degrees Celsius

B.0 degrees Celsius

C.-40 degrees Celsius

A.Storage time: one week (NVR)

B.Storage time: two weeks (NVR)

C.Storage time: two months (NVR)

D.Storage time: three months (NVR)

E.Storage time: one week (SD card)

F.Storage time: one month (NVR)