ISJ-WJK70BT4 Bluetooth Keyboard Video Review

Hi. Can you tell me the difference between the keyboard models:

ISJ-WJK70BT4

ISJ-WJK73BT4

Thanks

Just got a the keyboard/mouse keyboard says model SK73-3,but your website has it as WPJN-073-3, . when using MacBook pro what do I push to turn on the backlight on the keyboard.

Just got a the keyboard/mouse keyboard says model SK73-3,but your website has it as WPJN-073-3, . when using MacBook pro what do I push to turn on the backlight on the keyboard.

TO CONNECT THE KEYBOARD TO THE COMP I NEED TO FIRST WRITE A PASSWORD TO ENTER MY USER BUT I CAN’T BECAUSE THE KEYBOARD DOESN’T CONNECT BUT WHEN I OPEN THE ACCOUNT I CAN USE THE BLUETOOTH
HOW CAN I CONNECT?

IT IS ALREADY CONNECTED WITH THE WIRE

I purchased your wireless 7 color wifi keyboard model number ISJ-WJK70BT4 about 30 days ago and loved it
UNTIL ,, it went into training mode or something

Now there is a delay between keystrokes and an audible clicking sound

I have looked everywhere for the secret to turning this off, but have found nothing.

Very frustratiing
please help
thanks