| Type RF Family/Standard Protocol Modulation Frequency Data Rate (Max) Power - Output Sensitivity Memory Size Serial Interfaces GPIO Voltage - Supply Current - Receiving | TxRx + MCU Bluetooth Bluetooth v4.0 Low Energy GFSK, GMSK 2.4GHz 4Mbps 12dBm -95dBm - UART - 2.2 V ~ 4.8 V 41.2mA 41.2mA |