Review on ⚡ Reliance Controls THP103 AmWatt Appliance Load Tester/Plug with Ammeter and Wattmeter - Blue by Michael Skerving

Accurate results! Very well built. Unlike other white meters, this one plugs easily into any outlet, is designed for large devices, and lets you know if the device is using power when it's off. This is also extremely helpful if you are running a generator and want to know how much load you are putting on it. It can be a hassle to use a regular ammeter on your switch. You don't have to calculate the power or wonder if there are other things on the same circuit. The price is good I recommend.