the 9031 does have a backlight, I forget which button it is, but, if you press the double arrow shift button for 5 seconds it will go into program mode. If you press the B, I believe it's for the bell, V is for viberate on and off, and I'm thinking it's the D or 3 for display on or off. Well, it is either the 3,4,5,7,or 8, anyway, you will see it turn on and off.