A true plug individual arrester. Product inspiring confidence. Technical data rather rewarding. Excellent manufacturer warranty (a good return with No. series). Ideal for connecting a live box (avoids power strips that can interfere with the signal). Indispensable on every electromenager / electric device value (tv, computer, internet box, washing machine, dryer, refrigerator, dishwasher, freezer, electric boiler ....). Investment "important" departing but can avoid lightning strikes and surges of the network. Essential in indivuelle house