1. H.264 video compression, multi code stream. 2. Support 4CH 720P HD real-time video inputs. Also, support 4CH analog cameras inputs or compound inputs for 2CH HD cameras and 2CH analog cameras. 3. With exclusive pre-allocated type vehicle file system technology, it solved the file fragmentation problems which caused by overwrite, SD card data loss and SD card couldn't be found, keep the data completed and stable. 4. 8-36V wide voltage power supply, super low power consumption. With overload/ undervoltage/ shortcircuit/ reversing protection, support all vehicles. 5. Support SD cards, at maximum 512G for single SD card With watchdog abnormal restart protection function, it can better protect the machine and video. Delayed video recording functions when vehicle is shut down (time settings can be up to 24 hours). Various video recording modes to meet different demands, such as automatic recording, manual recording, alarm recording, etc. Support 4CH alarming inputs Support voice broadcast, intercom and text schedule dispatch. Support shockproof aviation connector, easy to plug or pull out, with best quality and best price, stable and reliable. With full enclosed lock design, it can prevent the man-made sabotage effectively; Support mouse operating. Support all vehicles, including bus, taxi, truck, school bus, etc. Colour:Black Material:Aluminum alloy+plastic Package Contents: 10 x 4CH MDVR Loop Recorder Kit