The specifications show it not to have Wi-Fi but, after it get's upgraded to Lollipop 5.1.1 it will enable Wi-Fi with including add-on setting options located in the Settings menu. The Wi-Fi does have support for IPv6 from the looks of it but, in the Wi-Fi menu you can connected it to 2.4GHz networks only.
This watch doesn't have a loudspeaker. Why it says yes here in loudspeaker option??