The BRD4173A Radio Board supports dual-band operation with its integrated sub-GHz ISM band and 2.4 GHz band transceivers. Thesub-GHz section is designed to operate in the European ETSI 433.05-434.79 MHz band with an external whip antenna; the 2.4 GHzsection is designed to operate at the 2400-2483.5 MHz band with the on-board printed antenna. The matching networks are optimizedfor operating at 10 dBm output power.