H.264 Standalone DVR/ 8ch network stand alone DVR/ stand-alone DVR system
YS-3504 H.264 standalone DVR system
Video input: 4channel BNC
Video output: 1channel BNC
Audio input: 1channel BNC
Audio output: 1channel BNC 
Alarm input: 4channel
Alarm output: 1channel
DSP: 100fps PAL, 120fps NTSC
Network port RJ45 10M/100M adoptive Ethernet network port
PTZ control port 1 RS485
USB port 2 USB portssynchronous use front and rear panel forbidden
Hard disk port 2 SATA port

Our plant manufacture Standalone DVR,  hardware and software compression DVR cards and CCD cameras. As

a manufacture, we do wholesale and OEM. Our Priority are:
  -Unlimited support to solve any technical problems
  -2 year quality warranty on all our DVR cards, life -long repair or replacement
  -Rapid delivery, the same day once upon your payment