Is there a password that I have to set up for each band?
No, each band uses the exact same password.
When I try to connect to my WIFI it says they cannot connect (can't find WiFi)
A number of wireless devices require that the name and password for the network be short and simple. Check to make sure that......
The name of your wireless network does not use any special characters like an apostrophe, asterisk, dollar sign, etc
The name of your wireless network is short......20 characters or less
The name of your wireless network uses only normal letters and numbers
The name of your wireless network contains no blank spaces
For example, if the name of your wireless network is something like.....
Snap2shotz's Red Apple Wireless Network
A number of devices will not be able to connect. Change the name to something like.....
Snap2shotzWireless
Finally, you may also need to use the option to assign a separate name to the 5 GHz band, and then be sure to point the doorbell at the 2.4 GHz network name.