Is the backlight always on or only when you push a button?
1151087
Light goes on when you push a button, and turns off shortly thereafter by itself.
1151088
The backlight comes on after you push a button for about 5 seconds. Still works like new almost 5 years later.
1616094
The backlight goes off by itself after about 10 seconds. You push the button to turn it back on.
755767
No the light only comes on when you hold the button. This video may be helpful. The thumblite comes in the video around around the 7:38 mark http://youtu.be/_ltOO-8jW5k
1443602
Yes, it disables all the buttons which includes the backlight. It is good when traveling with it but not using it at the time.
1020391
I realize this answer is very late, but in case anyone else has this problem - there's a button to turn the backlight on and off, it is off by default. If it doesn't have that button I would suggest returning it directly to Amazon and ordering a new one.
904397
The backlight has a green tint to it. Backlight only comes on when a button is pressed.
56384
Yes, there is definitely an on/off switch for the backlight - it's above the delete button. Btw been happy with this product so far.
1086677
I haven't had any problem with mine. I push the button - get bright - push again - it dims (not a whole lot). Don't get a flasher - maybe there's another button.
2112248
you can turn the backlight off or it or have it on all the time. if off, it will come on with alerts
2241161
No backlight as far as I can tell but it is instantaneous and continuous in its' readings.
2097029
You can set the light to come on when you hit any button. Stays back lite for about 2 seconds. No setting the time it stays back lite
514392
When I went through the various colors for backlighting, it started at the off position. I would imagine that if you set it at the off position, it will save battery power. I hope this helps.
641110
Yes, the screen is backlit but just like a mobile phone it is timed to go out after a few secs and comes on again when a button is pressed.Cheers Alex V.
2208716
It's the F5 button. There is no adjusting the brightness, however. It's just On or Off.
2152793
There is a side button. The only thing I did not like is that you only get a portion of the lights on at a time, so less effect.
2058401
Yes there IS a backlight, but it only comes on when you push one of the buttons, and then shuts off in a few moments.
1338277
Don't know. There is a UV light in the base but on mine it is always on. Pushing the button doesn't do anything.