The sister who is a teacher is using microphone in her class so that the class hear the lesson very well. She is not using microphone before but her throat is aching and it feels like swelling. The doctor is advising her not to talk much or shout because it is not good to hear throat. And so the sister decided to use microphone instead. Few days ago, the microphone is not working. Good thing the older brother is an electrician. After checking it, he just told the sister to buy xlr adapters and the microphone will be useful again. The sister is happy now. Big thanks to our skilled older brother.