Thank you for your question. We confirm it is the power save mode. The SoundCore Boost speaker will be auto power off in 10 minutes when Bluetooth disconnected or no music played in 30 minutes. Under aux-in mode, it will auto power off in 10 minutes if no music played. We understand it may cause the inconvenience for connecting it with Echo Dot, we will consider improving the power save mode for the upgraded version. Thank you for the understanding.