Copy the text between the double lines (Not including the double lines) at the end of this document. You will use either #WEP Types or #WPA Types, depending on the encryption used by your wifi network. Most likely, you will use #WPA Types.
(All text in a line beginning with a # is notation, and does not affect the upload.
On your computer, open a new text document and paste the text.
Type in the name of your wifi network after "SSID=" and your wifi password after "WPAPSK=" (or "WirelessKey=" for newer clocks).
Save your text document to a Flash Drive.
The file will be named options2.cfg (or updataoptions2.cfg for newer clocks). Take note, that if your computer does not display file extentions (e.g. the .txt in "textdocument.txt), you will need to change your folder settings to display file extensions. Otherwise, you will end up with a file named "options2.cfg.txt" or "updataoptions2.cfg.txt".
To show file extensions in Windows, please follow the instructions on the following page:
https://www.howtogeek.com/205086/beginner-how-to-make-windows-show-file-extensions/
Take your USB drive to the clock. Insert the file, then go to: Menu >> System >> Update. The clock will let you know the upload is complete. Escape back to the date and time page, remove the USB drive, and reboot the clock by holding down the red key for 3 seconds. Press the red key again to boot up the machine. Your clock will search for the wifi network, and it should connect after a few moments.
================================
# WEP Types
# AuthMode Options: OPEN or WEPAUTO
# EncrypType Options: WEP or NONE
# Key_Type Options:
# Use 0 for 10 or 26 HEX Chars
# Use 1 for 5 or 13 Alpha Chars
#
SSID=
AuthMode=WEPAUTO
EncrypType=WEP
DefaultKeyID=1
Key1Type=1
Key1Str={Password}
=================================
=================================
# WPA Types
# AuthMode Options: WPAPSK or WPA2PSK
# EncrypType Options: AES or TKIP
# WPAPSK Options: 8 Alpha Chars / 16 Hex Chars Minimum
#
SSID=
AuthMode=WPA2PSK
EncrypType=AES
WPAPSK={Password}
=================================
For newer, Series 15 clocks, use WirelessKey= instead of Key1Str= or WPAPSK=
================================
# Series 15 Clocks
# WEP Types
# AuthMode Options: OPEN or WEPAUTO
# EncrypType Options: WEP or NONE
# Key_Type Options:
# Use 0 for 10 or 26 HEX Chars
# Use 1 for 5 or 13 Alpha Chars
#
SSID=
AuthMode=WEPAUTO
EncrypType=WEP
DefaultKeyID=1
Key1Type=1
WirelessKey={Password}
=================================
=================================
# Series 15 Clocks
# AuthMode Options: WPAPSK or WPA2PSK
# EncrypType Options: AES or TKIP
# WPAPSK Options: 8 Alpha Chars / 16 Hex Chars Minimum
#
SSID=
AuthMode=WPA2PSK
EncrypType=AES
WirelessKey={Password}
=================================