High resolution H.264,SD card Max.32GB * 2pcs,Compact size and easy installation Operating language: Chinese/ English Operation contact surface: Present in figures and diagrams menu operation contact surface(OSD menu) Cryptosecurity:After the manager password management(manager establishes),user cannot change content. Video input:4ch video input 1.0V,p-p,75Ohm Video output:1ch output 1.0V,p-p,75Ohm Video frequency demonstration:Single picture/four picture demonstration Video frequency standard: PAL service pattern:25/seconds,CCIR625 TVL,50 field; NTSC service pattern:30/seconds,CCIR525 TVL,60field Audio infut:4ch audio frequency inputs Image compression:H.264,Invariable symbol stream(VBR) Image form:CIF/HD1/D1 may choose Audio frequency class standard:ADPCM Date Storage:8kb/s Serial interface:Supports 1 RS232 connection,refers to the DB44standard;Supports 1 RS485 connection,refers to the DB44stsndard.
