Decided to upgrade to P4460. This was a bug for the following reasons: The menu and reset buttons rarely worked on my P4460. I had to click on them over a dozen times for them to register once. The rest of the buttons turned out to be more reliable, but still not 100%. This is very bad for a brand new device. The P4460's LCD display is much harder to read than the P4400's. P4460 cannot display power for low power loads. Anything under 9 watts was often shown as zero watts. It is useless for my applications. So I returned the P4460 and went back to my P4400.
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