| 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 v4.1 Low Energy - 2.4GHz 1Mbps 8dBm -88dBm 64kB Flash, 12kB RAM SPI - 1.7 V ~ 3.6 V 14.5mA 28.8mA |