The RF427 is a high-speed 900 MHz serial radio designed for unlicensed operation in Brazil. The RF427 is a frequency-hopping spread-spectrum radio with a configurable transmit-power output of 5 to 250 mW and user-selectable channel masking for improved RF interference immunity. This power-sipping, yet speedy, radio provides a cost-effective way to network data loggers. The RF427 is part of the RF407 series of radios that includes: RF407: North America (FCC & IC), 902 to 928 MHz RF412: Australia (ACMA RCM), 915 to 928 MHz RF422: Most of Europe and some of Asia (ETSI), 863 to 873 MHz RF427: Brazil (ANATEL), 905/920 MHz