Review on 🔌 Enhanced LCD Display Night Vision Power Plug Meter - Energy Voltage Amps Electricity Usage Monitor with Upgraded Brightness, Overload Protection, 7 Display Modes for Energy Conservation, Watt Meter by Tyler Owens

So the counter is perfect but I returned mine because the rep couldn't tell me what the constant time function does. I had to search the web for other counters using the exact same scheme to find it (and I had them back by then). The constant time function measures the time the device is exposed to a certain threshold load (probably a few watts, but all I know is that it exceeds 1 watt). It does NOT measure "power supply" duration as stated in the manual. It's fine as long as you know, but I thought it was a broken unit (so I returned it). It also sucks in the way it's defined because you can't use it to determine kWh/day consumption if it's an intermittent load. In any case, to be honest, if the rep just told me what the constant time function actually is, I wouldn't get the counters back. Now I know I think I'll buy more.