... 4CH playback 3)Backup mode:USB2.0 4)Battery:500mah standalone mini dvr♦Hisilicon 3515 chipset, embedded operation system♦H ... brightness, contrast, sharpness and color adjustable for each channel♦Support video sequence display♦Display modes:PIP, FULL, ... 576Display ModesFull screen, multiple screens, Sequence display, exchangeable channel display, picture-in-pictureAudio Input-8Db22kΩ,RCA connector× ...