Product model: SV-664 Video compression: mpeg-4 Operating system: embedded linux Preview resolution: pal: 704576(d1) ntsc: 704480(d1) Compress resolution : pal: 352 288(cif) ntsc: 352240(cif) Video input: bnc port 4 Video output: composite video output¼bnc port 1 Composite video loop output bnc port 1 S-video port 1, vga port 1 Display frame rate: pal: 100fps; ntsc: 120 fps Record frame rate: pal: 100fps; ntsc: 120 fps Audio interface: bnc port 2(rl input)+ bnc port 2(rl output) Alarm interface: 4ch input ttl 5v, relay output(no, nc , com) Hdd ide interface: 2 ide, support 2 hdd, each hdd can support 300gb Backup ways: 1 sud, support usb1.1; support usb flash disk, usb hdd Network: support browse by ie Ptz Yes Power/consumption Input:100-240v ac/1a output :dc12v/4a , ²25w Working temperature -10µ½½55µ Working humidity 10%½90% Size/weight 330mm*285mm*50mm , 1.8kg Neutral