The device in question is a Bluetooth 4.0 Battery Monitor that is resold under many brands, and which by itself would seem to do just what it is said to do, from monitoring a battery to running ...
Portable 4K OLED monitor offers 100-foot wireless connectivity and magnetically attached accessories
The monitor's headline feature is its magnetic design. This allows the seamless connection of accessories to the back of the screen, including a stand, RGB light bar, or a magnetic phone mount.
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