Shark NV501 On Wikipedia
in this wikipedia, you can browse the complete list of Shark NV501 Product including Shark NV501
https://en.wikipedia.org/wiki/Vacuum_cleaner

Shark NV501 Official Site
you can read many details and information about Shark NV501 in their manufacturer site. details like, complete features, technical spesification and etc.
https://www.sharkclean.com

R21080P
R21080P
http://r21080p.com

NV356e
NV356e
http://nv356e.com

BL610
BL610
http://bl610.com

GR4N
GR4N
http://gr4n.com