ISM Click Mikroe ISM Click contains a complete wireless RF digital data transceiver and features the RF Solutions RFM75 2.4GHz GFSK transceiver. The RFM75 transceiver is configurable through SPI serial interface. It operates with only 3.3V in the worldwide ISM frequency band from 2400MHz up to 2527MHz. The embedded packet processing engines enable operation with a simple MCU as a radio system. Burst mode transmission and up to 2Mbps air data rate make it suitable for applications requiring ultra-low power consumption.