It protected anything what required to do for equipment of 110v, 120v and 220v, 230v, 240v. Bear in mind join with 110v only appliances great for 110v, and join with 220v the appliances great for 220v.dBA Audio levels are calculated in decibels (dB). The decrease the decibel ranking, the less sounds the products makes. As an example, a ticking enjo