Mic Speaker is a free multimedia app developed by Seong Eon Kim for iPhone users. This app offers a unique feature that allows you to output sound through the microphone by selecting the speaker unit. Whether you want to use it as a loudspeaker, a megaphone, or a hearing aid, Mic Speaker has got you covered.

One of the main features of Mic Speaker is its speaker output switching function. This means that you can easily switch between different speaker devices to output the sound from the microphone. Whether you prefer using a Bluetooth headset, a Bluetooth speaker, earphones, or a headset, this app can accommodate your needs.

Another great feature of Mic Speaker is its compatibility with YouTube. You can listen to music and sing songs through YouTube while using the app. This makes it a great tool for practicing songs or even using it as a karaoke microphone.

Additionally, Mic Speaker allows you to play the sound from the microphone in the background. This means that you can continue using other apps or perform other tasks on your iPhone while still using Mic Speaker to output the microphone sound.

Overall, Mic Speaker is a versatile app that offers a range of features for sound output through the microphone. Whether you need a loudspeaker, a hearing aid, or a presentation microphone, this app can meet your requirements.