Eurocom P170HM Neptune - Manual (Page 166)

Modules
7 - 40 Wireless LAN Module
7
2. Click Network adapters to expand the sub-menu.
3. Double-click the Intel WiFi Link .... module.
4. Click Advanced (tab).
5. Click 802.11n Channel Width for band 2.4 under “Property:”.
6. Click the pull-down menu under “Value:”
7. Click to select Auto.
8. Click OK and close the control panels.
Figure 7 - 25
Intel WiFi Link
Properties
(Advanced)