... quad monitor with video recording function; the recording file stored in SD CARD; maximum 32G, supporting 12 hours continuous recording; ... to mirror image. Cameras image display mode: single, dual, triplex, quad, PIP functions, trefoil, and Y-split image available ... convenient operation, with innovative functions9 '' quad monitor with built-in DVR (MO-141)LCD Dimension: 9 inchesSystem format: NTSC/ ...