I cannot, in all good conscience, rate this item higher than a single star. Though I have had this unit for a few months now, it has failed on me numerous times, more than any reliable UPS should. Even when there is no power interruption, the unit will often click off unexpectedly, effectively shutting down every single electronic that is plugged into it. This is quite frustrating (and frankly inexcusable), especially when I use this device with all of my high-end equipment. Another faulty characteristic of this device to note...it makes a frequent and EXTREMELY annoying high-pitched beep every time it clicks off (so unless you're deaf, I strongly urge you to take this into consideration). If you value your electronics, DO NOT BUY THIS! I would recommend a CyberPower unit, which is far more reliable and priced fairly.