... VGA video input, 1ch Audio output USB backup,support record,support mouse Pan\tiltlens control, alarm function, talkback function ... control all functions support 4 pieces SATA Serial big hard disk under 1T Multiplex support Chinese/English/Russia/Japanese languages ... CH audio outputSupport Chinese/English/Russia/Japanese languagesUSB backup, support record, support mouse, VGASupport 1, 4, 8, 16 channels ...