P3 International P4400 Kill A Watt Electricity Usage Monitor for $18.74

P3 International P4400 Kill A Watt Electricity Usage Monitor for $18.74.  Here is a screenshot for your reference.  Shipping is free on orders over $25.  If needed, use this Filler Tool to pad the order for free shipping.  Kill-A-Watt is a tool that helps identify power-hungry devices by measuring their actual usage.  Alternatively, it is available here for $20.99 shipped.