Purchased replacement Zenergy Cube. The software configures its operation to manage the PC. It is fairly complete but poorly documented and very explicit. For example, to change the settings, you must login with a password that can not find anywhere. Fortunately, the Infotec company based in Nantes is responsive and effective. A simple phone son and the person gave me the initial password with great kindness: administrator! Should know. The company looks good track and it is French! And on the eve of August 15, there are competent people. If the product works properly: backup and extinguishing the PC set to 3 minutes, but the battery is capable of much better. One can choose a complete stop or sleep which is handy for my mediacenter. 3 taken unsaved but surge protection are useful to protect my TV reducing the battery power demand and thus extending battery life. An outstanding issue on which the technician has no answer: the power factor is therefore 0.5 500 VA 250 W are while other manufacturers announce therefore 0.6 300 W for 500 VA. Why? And why the effective power in W it is not clearly mentioned in the files? That's why the star in less! In case of problems, I invite you to contact Infotec in Nantes that are helpful and knowledgeable. Bought from Mr. Plus via Amazon: them also provide. Read my review of the seller also.