You can get them cheaper through thinkgeek.com
Great use for checking the efficiency of appliances, otherwise just go read your meter right-left yourself.
4x5 Reviewed by 4x5 on . WHO has one of these and would like to tell us about it? http://www.bghydro.com/BGH/Itemdesc.asp?ic=MKAW&eq=&Tp thank you Rating: 5