Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: How long will this scale stay on before timing out and shutting off? More than 300 seconds?
Document: It also take no time for you to get the weight reading on the display, it is displayed in a matter of seconds.I highly recommend this scale.
This scale has only been in use a couple months, but it is very easy to use and provides accurate readings every time. Only problem we had is that it doesn't want to shut off sometimes when you push and hold the button, but it turns itself after about 30 seconds.
I needed a scale to weigh my foods for weight loss and this works great. It can sometimes take a few seconds for the correct weight to show up but thats not a huge deal breaker for me. It's simple to use!
I was very pleased with the look and design of the scale. It's easy to read and best of all it works. I can now accurately weigh my food and stay on track with my diet program.
I really like this scale, and it works really well. It is a nice size, big enough to handle the necessary quantities, but small enough to stay out of the way on the counter.
Problem with this scale is that in a hyperactive attempt to preserve battery power, it turns off too soon losing your measurement. Example: I placed a bowl on it, starting at zero as expected. I began grating cheese into the bowl watching the measurement increase, I paused for a very short moment (very short, less than 15 seconds) and it blanks out.
This food scale doesn't stay accurate on the weight. Very irritating because when making homemade soap the weight of all the oils have to be precise. Its expensive to make homemade soap and now I have to look for another set of scales.Wished this one would of worked out.
I love the fact that this food scale is user friendly. Lately I have been trying to be more health conscious and pay attention to portion sizes. This scale allows me to stay on track with my health and fitness goals. Very easy to use.
I hate this scale passionately. I set it to grams, and it only displays even numbers. Sometimes it will randomly subtract 2 - 8 grams, so I have to stay on top of it. I've been way off a few times and screwed up some recipes. You get what you pay for, I suppose.
Apparently air has a variable weight -- from the moment I turn this scale on, it only is zero for half a second, before climbing up to 40g and then oscillating to -20g. It just won't stay at a stable weight. I chose this scale because of all the great reviews, so I'm hoping this is just a lemon and not all of the scales are like this. This one, however, is simply unusable.
Answer: Never really timed it, but the operation manual says it will shut off after two minutes of inactivity.