| Type RF Family/Standard Protocol Modulation Frequency Data Rate (Max) Power - Output Sensitivity Memory Size Serial Interfaces GPIO Voltage - Supply Current - Receiving | TxRx Only General ISM/SRD < 1GHz - ASK, FSK 868MHz ~ 870MHz 64kbps 13dBm -109dBm - I²C, SPI - 2.1 V ~ 5.5 V 9mA 12mA |