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Recommended operating voltage: +5V
0V (internal LDO for nuclear power 1
simplify operation
5mm mono-channel microphone connector + microphone pin interface
or low power inverter
Buzzer 12V SIM800L GPRS GSM Module Recommended operating voltage: +5VIntroduction : This buzzer is an active buzzer, which means that it will buzz at a predefined frequency (2300 300 Hz) on its own even when you just apply steady DC power. Features : Rated Voltage : 12V. Operating Voltage : 4 12V. Resonant Frequency : 2300 300 Hz . Operating Temperature : 20C to 45C.
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