Woods Appliance 1-Outlet 900-Joule Surge Protector with Alarm, Gray, 041000: * Features 900 joules of surge protection and a grounded 3-prong outlet * Alarm sounds when surge protection has been exhausted and notifies that unit needs to be replaced to continue protecting your valuable appliances * Protects appliances from surges, spikes and sudden changes in electrical voltage * Use with microwaves, garage openers, refrigerators and much more * Comes with a 100,000-dollar connected equipment warranty protection