Depending on which firmware your Onyx is running, it could be any of the following:
OnyxRouter
SSID (WiFi Name): OnyxRouter
Key (Password): Impact101
WiFiX
SSID (WiFi Name): WIFIX
Key (Password): 12345678
Rooter
SSID (WiFi Name): ROOTER
Key (Password): rooter2017
Hi-Spider
SSID (WiFi Name): HI-SPIDER
Key (Password): *Open Network, no password*
ZBT-China
SSID (WiFi Name): ZBT-CHINA
Key (Password): *Open Network, no password*
To change the SSID & Password on your Onyx Router, please follow the instructions in this article.