... analog system, to choose DVR or HVR, just one SDVR can work.Super Strong processing capacity: can ... time playback synchronously. Real Full D1 products.Support super cloud service (this function is optional, specialized ... playback1-9ch playback synchronously; Under the mode of DVR, Max support 4CH D1 real time playback ... ) x 45(Height) 4-CH Super DVR with Could access, HDMI output, 3G/WIFI