CTC Dual Extruder 3D printers are not reliable and not recommended as their extruder have very bad reputation and getting bad very fast.so try to be away from CTC printers.
Also CTC Dual extruder printers comes with USB useless Key every other hour its giving error asking "inv roll" ( need new USB key) its all wastage so beware!!
Also CTC Filaments are ver fragile and during printing filament can brake any time so your job wont complete don't buy CTC PLA filaments.
As per our best of knowledge CTC Dual Extruder 3D printers.
Another bad thing they are offering with reduce price but same time they are not giving filament s or giving one filament only (suppose to be with two 1kg each filaments) also reduce some parts like filament holder Teflon tube etc. dose not make any sense if reduce price and same time reduce some parts that you need to buy after what is th use to get cheaper its kind of incomplete 3d printer. so keep this in mind before buying.
Please note: Above are our observations and recommendations but we are not taking any responsibility. Just for your reference.