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Each variation starts at 2 pcs when added. Weight is estimated (~0.02625 kg / unit). Final shipping is calculated after weighing in Bangladesh.
Data download: Link: https://pan.baidu.com/s/1P3P0YlEnfLFL3eYfyaXdkw Extraction code: hzng The electret microphone amplifier board adopts the original imported MXA4466 electret amplifier chip. Adjustable version The gain can be adjusted by the value of the adjustable resistor on the board. Fixed version The gain can be adjusted by changing the resistance of R6 (there are plug-in pads at both ends of R6, and the chip resistors can also be replaced with plug-in ones). Board size: 16mm*12mm Gain: 30db Working voltage: DC 2.4V-5.5V