Only after purchasing this item did I find that it would not do the job intended, i.e. protect my computer installation. Belkin have developed three stages of protection and this product is the lowest, specifically intended for home (kitchen) appliances such as microwaves, blenders etc. This is termed as "Essential" protection. The next stage is "Advanced" , suitable for Mid level Audio/visual equipment while the third stage "Extreme" is for High Technology equipment (computer etc).
The product works for me as I have placed the lesser items on this strip (sound, telephone, printer) and purchased the Extreme protection for the main computer equipment. Also each strip must be connected to a mains wall socket, as trailing two strips in series voids the guarantee. Presumably, you lose the benefit of the surge protection.