| Type RF Family/Standard Protocol Modulation Frequency Data Rate (Max) Power - Output Sensitivity Memory Size Serial Interfaces GPIO Voltage - Supply Current - Receiving | TxRx Only Bluetooth Bluetooth v4.0 Low Energy GFSK 2.4GHz 1Mbps 4dBm -87dBm - I²C, SPI, UART - 1.9 V ~ 3.6 V 14.5mA 14.5mA |