This is a set of wired vehicle reversing safety system, which consists of 7" HD monitor, HD 4CH HDD Mobile, HD cameras, can record 4 pictures at the same time, can fully see the surrounding of the vehicle, with GPS/4G/WIF mobile dvr, Real-time information and video can be transmitted to the CMS platform or the customer's own platform,give your drivers the tools and peace-of-mind to drive more confidently and safely.and at the same time making fleet management more convenient, fast and accurate!