This device is great for, say, operating a laptop and a monitor during a power outage. It can also run your internet modem and router for quite some time on a 7.5 Ah battery.That said, it automatically shuts off after 1 min if load is < 5W (see its manual). This makes it useless for one of my use cases ... a Chromecast Audio (about 600 mW) and a small Logitech audio/speaker dock (~700 mW).It also can't run larger devices.So, if you want to run small items, measure their power before purchasing. If < 5W, this won't work. If your goal is to run larger items or several devices whose draw could be > 150W, measure first, and consider going up to the larger-wattage versions.