... it is an embedded Linux system DVR with 4 channels. It has high-intelligentization and stability with an embedded processor and operating system ... port,Support 2.5 SATA HDD,Drawer-type designRecord mode: sensor,programmed,motion; support 4channels video/2channels audio record in ... HOST port,one for recording data back-up,another for sensor dataSupport WIFI function, can wireless backup the videos on ...