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Dragino S31B NB GE NB IoT Outdoor Temperature and Humidity Sensor hub lorawan voltage regulators U3V50ALV (blue line) hub displays voltage regulators U3V50ALV (blue line) and U3V50AHV (red line) and reverse voltage protection (up to 40 V) it provides a strong reliability and long term stability (Real world battery life depends on the use environment
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