Model	PT-504	PT-508	PT-516
Video compression	MPEG-4
Video input	4ch	8ch	16ch
Video output	4ch	8ch	16ch
	3 Composite video output/ 1 S-Video output/ 1 VGA output Connectors
Display Frame Recording & Playback	100fps (PAL) 120fps (NTSC)	200fps (PAL) 240fps (NTSC)	400fps (PAL) 480fps (NTSC)
Display Resolution	NTSC (720x480), PAL (720x576)
Video Grade	Low/Normal/Fine/High/Highest
Audio compression	G.723
Audio input	4ch	8ch	16ch
Audio output	2ch
Audio Recording& Playback	16ch audio recording/ 1ch audio playback for selected audio channel.
Device Support	CD/W ;DVR	USB2.0	Mouse operation
Alarm input	4ch	8ch	16ch
Alarm output	4 relay output connection
Playback research	Multiple Search Categories (Date/Time, Motion, Alarm, Manual)
Pentaplex	Simultaneously Live, Record, Playback, back-up and Network User-friendly GUI Menu, Mouse Operation
	PTZ camera control support in local and remote area
Network Function	- Static IP as well as Dynamic IP (DHCP, Floating IP) and DDNS support - Live or Recorded Video Accessing via Ethernet - Remote Configuration. - Multi-user accessing support/ CMS (Center Monitoring Software) support - Two way audio transmission, Remote Event (Alarm, Motion) Notification
Others:	OS: Embedded Linux Multi Task: Record, playback and transfer, Control Device:Front keys IR type remote controller/Network viewer/Matrix PC Viewer: Direct viewing of DVR¡¯s HDD on PC
This Embedded Linux Stand-Alone DVR can record 4/8/16 channel video and 4/8/16 audio at the same time. It provides playback, live same time. It provides display, back-up and network function while it is in recording mode.