content: I only give it 1/5 b/c there isn't an option for 0 stars. After proper set-up and installation, the unit doesn't show any type of measurements. I'm not sure what's the problem, maybe it's the sensors that are bad. But even with the cheap price you would expect it to work at least ONCE! I guess it's a hit or miss when you dealing with low-end accessories like this one. Spend a couple extra bucks and get yourself something that will last you longer than 0 minutes.