The HopeRF RFM300HW-868S2 is a compact 868 MHz ISM band transceiver module with up to +20 dBm output power and –120 dBm sensitivity for long-range, reliable communication. Supporting FSK, GFSK, and OOK modulation at data rates up to 300 kbps, it features low power consumption (7 mA RX), SPI interface, and a 16 × 16 × 1.8 mm SMD package, making it ideal for home automation, industrial monitoring, metering, and security applications.