Our electric bill has been really high lately and I was determined to find out why. My brother recommended this gadget to me and I am so glad he did. You plug your electronic device into it and the lcd screen on the front tells you the following information: volts, amps, watts, power factor, frequency, KWH, and a timer.
I pluged it into my 40 year old refrigerator downstairs and realized that it was costing me more than $20/month to run. .33kwh/hour 24 hours a day 30 days a month at .095kwh equals $22.66 month.
After that, I got curious as to what other things cost me around the house. For example, turning my computer off but leaving it plugged in would cost me $3.43/mo while leaving it in sleep mode only costs me $5.64/mo.
I would highly recommend this product to anyone who is curious about their electric bill. You can find out in a matter of minutes what is costing you the most money. You could save the $20 is costs you to buy the kill-a-watt in the first month.