(1) We use well-designed standard MK8 extruder, high quality stepper motor and direct drive extrusion wheel, more accurate, quick heating and fluent injection, We have made necessary design to prevent "jammed" problem. Printing speed up to 100mm/s. here is the test video https://www.youtube.com/watch?v=V-MTabg3bYw&feature=youtu.be (2) We use the latest MK3 Heatbed 3mm Aluminium PCB Board, dual power supply, operate at 12V or 24V. Heated bed keeps a certain temperature to prevent warping, and cooling fan speeds up solidification of the extruded filament. this would reduct your calibration time a lot ! (3) We offer LCD 2004 controller with SD card design support totally off-line print, no computer needed while printing. then you don't have to spare one computer for your 3D printer use only. (4) We have pre-install the 3D printer firmware for you . so even you know nothing about firmware , you can still get it working . (5) We don't just sell them, we also provide good after-sales service, so welcome to discuss with us, we will try to do technical support as much as we can, please feel free to send us an email, we will also help you to complete the project !