BOSTON and CAMBRIDGE, England, March 18, 2008 – Energy Optimizers Limited (EOL) has developed a ZigBee-based plug-in electricity meter that can help companies and households shave hundreds to thousands of dollars off their electricity bills. The U.K. company’s device, called the plogg, allows building-owners to monitor how much electricity is being used by individual appliances and electronic devices so that energy efficiency can be improved. Recent studies by the British government and the Carbon Trust show that people can save 5% to 15% of the electricity they use by using smart meters to manage energy demands.