If you have any doubts, please feel free to contact us.Each site has customer service.:o:o:o
1.QiDi 3D Printer page on Alibaba : http://qidi3d.en.alibaba.com/
2.QiDi3D Printer page on Amazon :
http://www.amazon.com/TECHNOLOGY-Ext...rds=3d+printer
3.QiDi 3D Printer page on Ebay : http://www.ebay.com/usr/qidi0426?_trksid=p2047675.l2559
4.QiDi 3D Printer page on Aliexpress: http://www.aliexpress.com/store/1544433