【What's PRO than Mars? 】BGW15CA Linear guideway with accuracy of 0.02mm, smoother, quieter and more stable. 50w Matrix LED UV light source offer more uniform light emission, curing time lower to 6s per layer. Built-in Activated Carbon Filter, additional cover rubber sealing, no need to worry about the odor of resin 【Convenient and Easy to Use】The build plate has changed to CNC turning CD pattern, which provides stronger adhesion when printing. The improved translucent resin vat is lighter. The USB port has changed to front from back, it is more convenient to plug the flash drive. Mars Pro also refactored user interface with dark background and simulant icons 【Add Air Filter System】Mars Pro add a rubber sealing to the upper cover to prevent the resin odor from out of the cover. The built-in activated carbon filter can absorb and eliminate odor, so there is no need to worry about resin odor during printing 【Better Printing Quality】Thanks to the upgraded Matrix 28 50W UV LED light source,the uniformity of light is increased to 95%. It means more accurate print size, layer exposure time is also reduced to 6 seconds. Mars 2 support .ctb format, smaller files but greatly increase the success rate of printing of bigger models 【MSLA Technology】Digital mask controls which regions of the print area are illuminated by a panel light source array. This allows every object on the built plate to be photocured simultaneously. It means an ELEGOO Mars Pro printer can print 2 and more models as quickly as one. Mars Pro MSLA printer are much faster than SLA or DLP printers