The default passwords for both 2.4G and 5G Wi-Fi of ER605 are the last 8 digits of the device's SN (Serial Number). To view the SN, you can:

1. directly check the "SN" label on the ER605 body;

2. log in to the WEB interface (192.168.2.1) → [System → Device Information], and view it in the "Device Serial Number" column. The last 8 digits can be used as the default WiFi password.