  Yes, the Zino 400 comes with internal antennas, you can buy and install a wireless card and it will work. The service manual can be found HERE .   Hope this helps, and thanks for using the Dell Community Forum! Regards, Robert
I recently ordered a basic Zino configeration without a wireless PCIe card. I want to add wireless. Question: Does the Zino come with an internal antenna or do I have to buy one if I order a Dell Wirless Half-Height Mini card? Does the card come with the antenna? 
Zino Wireless Option