Deal: P4400 Kill-A-Watt Electricity Detector & Monitor for $19

According to Dealsea.com, SuperMediaStore now has P4400 Kill-A-Watt Electricity Detector for $23.99. Use coupon code silverbells to get a $5 discount of the listed price and the shipping is free. According to the production description:

The Electricity Detector and Electricity Monitor can reduce your monthly electric bill and help you save a lot of money. Electricity bills can be murder. But now with Kill a Watt you can cut down on costs and find out what machines are actually worth keeping plugged in. Simply connect your appliances to the Kill A Watt and Kill a Watt will assess how efficient they really are.

It seems to be a nice gauge to have and the review on the SuperMediaStore website is positive (though only three reviews so far). If it can indeed help me save on electric bill, as  it claims it can, then it is worth the $19 cost. Jonathan at MyMoneyBlog.com has a nice discussion on this product back in October.