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Feature	3Play 820	3Play 425
Video Inputs	8	4
Output Modes	A;B ; A+B	A;B : A+B
Playout Channels	2 Simultaneous, switchable; Fully Independent	2 simultaneous, switchable; Fully independent
Switch Angle During Playback	Switch between all available camera angles	Switch between all available camera angles
Recording Channels	Up to 8 simultaneous	Up to 4 simultaneous
Recording Capacity (HD)	200 HRS (50 HRS per hard drive)	30 HRS (15 HRS per hard drive)
I/O Configuration	Session standard; any combination of supported resolutions	Session standard; any combination of supported resolutions
High Definition	Yes	Yes
Standard Definition	Yes	Yes
One-Button Recording	Yes	Yes
Batch Media Import/Export	Yes	Yes
Import Media While Live	Yes	Yes
Background Music for Playlist	Yes	Yes
Playlist Transitions	Yes	Yes
Multi-View Monitoring	Yes	Yes
HDMI Output	Yes	Yes
AUX Output	Yes	-
Removable Storage	Yes	Yes

3Play - Compare