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LM386 3-5W Mono DC 3.7-12V electret microphone amplifiers with Volume Control
Supply voltage: DC 3.7V - 12V, Can be used with Li-ion batteries
Output power: 1 x3w (mono)
Signal to noise ratio: 100 db
Recommend speaker impedance: 8 ohm is best (4 ohm 6 ohms can also be used)
Signal to noise ratio: 100 db; Size: 25mm*25mm