I keep losing my phone. This cube (not really a cube, more like a square but whatever) helps me find my lost phone. The only problem, however, is that I have to keep Bluetooth on at all times, which drains my phone's battery. I guess that's a small price to pay to keep an eye on my phone. It also finds your keys if you search for the "cube" with your phone. I never lose my keys so this feature is unlikely to be used.
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