Price reduced to £10,
still selling for £20 at Asda Direct and £38 at Tesco directhttp://direct.asda.com/Owl-Wireless-Electricity-Monitor/001127622,default,pd.html
Found at Stafford branch
"The OWL allows you to see the amount of energy wasted in your home, as it measures the electrical usage of your home appliances. It cleverly measures electricity consumption using kilowatt hours"
Includes a remote monitor, sender box, batteries and instructions.