I already have an inverter of the brand. This product is sustainable since the battery of a standard size, can be easily changed. Practical: a LED on the device indicates the end of battery life. The configuration "Strip" of the device is essential for conventional domestic equipment without detachable power cord. Finally, the "power save" function is very useful when using devices with transformers. Ability to protect ADSL line without big loss rate. Finally power management software compatible PC Mac comes on the installation CDROM (tested, works fine)