Watts up? PRO "plug load" Meter

Watts up? are "plug load" meters that measure the amount of electricity used by whatever is plugged into them. Fast, intuitive and easy-to-use, Watts up? quickly and accurately measures any 100- 250 VAC device. It records all the data as fast as once per second so you can see the load profile as it changes over the course of a day, week , or any time frame desired.