Very good product, easy to use. It allows me to protect a powerful +++ computer, a screen, livebox and telephony, network, without flinching. Protects against surges and outages. One small problem: I advise you to buy early 2 or 3 special Strip. Indeed, you can not directly connect an electrical outlet on the "inverter. You must have type soft power cables or computer (male or female, I do not remember)