Audio Procession System (MobileBT) - Battery, Volume, and Microphone Evaluation

in this video you will learn some facts about Audio Procession System MobilBT (LDM)
How to change the battery in the Audio Procession System MobileBT (LDM).
How to set a channels for the wireless microphones.
How to modify the portable audio system.
How outdoor audio system is built.
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