The Lenovo T530 has an 802.11n WiFi standard which is better than most portable PCs that have been available for more than two years. Most portable PCs that have been available for around the same time as it have an 802.11b WiFi standard. In addition, this notebook PC has an 802.11g WiFi standard.
This portable PC's Wi-Fi standard (802.11n) is actually the best Wi-Fi standard across all portable PCs that were released around the same time as the T530.
An 802.11a WiFi standard is the worst Wi-Fi standard amongst similar types of portable PC.