ITEM NAME:LM386 Electret Microphone Power Amplifier Board Gain 200 Times DC 3.7V-12V Z a.imagelink a:hover.imagelink {color:#db3606;.1pcs x LM386 Electret Microphone Power Amplifier Board. Deafness hearing aids: board connected to the microphone, power, headphones, is a good deaf hearing aids. Board Size(approx): 25mm x 25mm.
