Auto Leveling---To print beautiful and high quality models, this system will increase the accuracy of printing, keep the plate more stable. It helps you to fix position and can also save your time, reduce errors. Full Color Touch Screen---More simple and easier to use, Supporting operating systems windows 7 and later, Mac OS X, Linux. 4 Step Installation---Only 4 steps to complete the installation, so that you can use the 3D printer more quickly. The package contains sample PLA filament and a 8G MicroSD card with preinstalled models, you can start printing once it is in your hand. Two Important Features ---Resume Printing After Power-off and Filament Sensor ---Supporting persistent power interruption, it can effectively save your time and reduce the model crap caused by power outages. Moreover, when the filament runs out or disconnected, the printer will automatically pause to insure the model can be smoothly printed. After-Sales Service --- Support@tronxy.com Tronxy will offer lifetime technical support and give satisfactory response to you.Except for legal holidays, we can't reply you in the first time. During other periods, we make sure that you can receive our messages in a very short time. For the quality, We will provide strict testing for key components before delivery, believing that you can get our best service.