Pyle PLCMTRDVR46 Truck Bus HD 4 Camera DVR Video Recording System, Dash Cam 7" Display Monitor (4) Camera & video monitor display system - dir. Dash cam style recording ability Quad view 4-camera Source zone display - view all cameras on-screen at the same time 7 display monitor (800 x 480 pixels) SD memory card reader for easy File saving & File transfer Backup/reverse Camera trigger: automatic activation when in reverse Gear - 4-pin video connectors 12/24V system - includes all necessary cables & wiring - Marine grade waterproof night vision cameras