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NRF51822 Bluetooth BLE4 2.4GHz Wireless Communication Module E-934 Onboard chip: nRF51822 Communication distance (open outdoor@1M data rate): 30 m Frequency range: 2.4GHz Operating voltage: 2.0 Volts to 3.6 volts Operating temperature: -40° ~ 85° Expansion pin header: all the I/Os except P0.26 and P0.27

