Generally speaking, a surge protector with 1000 to 2000 joules will provide sufficient protection for power tools and office/dorm room essentials such as computer, internet, modem, projector, printers, and gaming accessories, etc. This surge protector power strip turns one wall outlet into 4 widely spaced outlets with 1440 Joules surge protection, protect your home/office/dorm room equipment from voltage fluctuations, surges and spikes.