The Latitude 14 7404 has a better Wi-Fi standard than most portable PCs that were released more than two years ago. This notebook PC has an 802.11n WiFi standard, whereas most comparable spec portable PCs that have been around for a similar time to it have an 802.11b WiFi standard. In addition, this portable PC have an 802.11a and 802.11g WiFi standard.
This laptop's Wi-Fi standard (802.11n) is in fact the best Wi-Fi standard across all portable PCs that are a similar age to the Latitude 14 7404.
An 802.11a WiFi standard is the worst Wi-Fi standard amongst similar types of laptop.