Language supportï Chinese, English, Russian, use H.264Video compression formatïHisilicon3520DV200 chip Software is powerfulïMDVR chip and camera use Double Circuit Power Supply,The system is more secure and stable 4ch video in use aviation portCVBS video outputï 1ch audio input 1audio outputï1 CVBS output support one SD card slot ïSD max support 256GBï ACC Ignition start and delay shutdownï4 ch switch alarm input(Optional Accessories) PAL and NTSC change Wide power input DC8-36V, adapted to automobile voltage fluctuation platform use cmsv6 ,have mobile APP,4G module use EC20 or EC25