The Lenovo E545 has a better Wi-Fi standard than most similar spec notebook PCs that are a comparable age to it. This portable PC has an 802.11n wi-Fi standards, whereas most laptops of this spec and age have an 802.11b wi-Fi standards. This notebook PC also has an 802.11g wi-Fi standards.
This laptop's Wi-Fi standard (802.11n) is actually the best Wi-Fi standard amongst all portable PCs that were launched more than two years ago.
Amongst similar types of laptop the worst Wi-Fi standard is 802.11a.