This device was very valuable but I kept factory resetting it. Antenna reception was very poor even with a strong signal in the 2.4 GHz band. Lots of disconnects and poor volume control through the app. The software offers a firmware update, but that also failed. Judging by the web interface, the device's software is 4+ years older. This can be the cause of many problems. When it worked, the sound quality and power output were good.
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