Synhorn Intl Electronics(h.k)ltd is a SYNHORN INTL ELECTRONICS(H.K)LTD based in Shenzhen , China. Synhorn Intl Electronics(h.k)ltd is a member of exporthub.com since August, 2010. Our business is related to Security & Protection industry and we specifically deal in DVR,DVR card. Please find our product details below:4 channel DVRItemsSpecificationsModel Name DVR7504HCompression StandardH.264 ¼ˆ ASIC ¼‰ResolutionPreview resolution¼š704 x 576 ( PAL ) , 720 x 480 ( NTSC ) Playback resolution¼š4 x CIF Frames¼š1F/S 30F/S ¼ˆAdjustable¼‰Hard Disk1 SATA Hard Disk interface (Support Capacity from 40G to 2T )Video Input4 channel, BNC , 1.0V p-p/75ΩComposite Video Output1 channel, BNC, 1.0V p-p/75ΩVGA Interface1 VGA, Resolution: 800x600, 1024x768, 1280x1024, 1024x600 optionalAudio InputNo AudioAudio OutputNo AudioAlarm InputNo AlarmAlarm OutputNo AlarmNetworkEthernet (10/100M )ã€LANã€WAN and ADSL Control WayUSB2.0 Mouse, Remote ControlBackup USB2.0, Network Bit RateMain Stream : 5 Levels optional ¼š120MB/H 500MB/H and self-definedSecondary Stream: 5 Levels optional : 20MB/H 140MB/H and self-definedPasswordEncrypted by 128-bit Numerical Digits with 2-Level Password ProtectionPower SupplyDC12V 3.0AConsumption15W¼ˆWithout HDD¼‰Working EnvironmentTemperature: +5„ƒ+50„ƒ¼› Humid¼š< 90%Device Dimension220×210 X 44 mm (WDH)WeightN.W: 2.0KG G.W: 2.5KG FEATURES:• Stand-Alone DVR, H.264 Compression ¼ˆASIC¼‰• High quality video Display : NTSC (720x480), PAL (704x576) real time display • Multiple Recording/ Search Categories: Date/Time, Event, Manual, Schedule¼Œalarm, motion detection• Real time recording support: 120 Fps for NTSC at CIF image (100 Fps for PAL)• 4ch Video recording at the same time • Pentaplex: Live, Record, Playback, Back-up and Network at the same time • Backup: USB 2.0 and NET backup supported Network Viewer&amp