The RF422 is an 868 MHz SRD860 radio designed to provide license-free operation for wireless serial communications in Europe. The RF422 transmits data at 10 kbps with a maximum power of 25 mW, and it employs listen-before-talk (LBT) and adaptive-frequency-agility (AFA) to provide a robust link of up to 5 km (line-of-sight). The RF422 supports point-to-point and point-to-multipoint data logger communications and PakBus repeater operation. The RF422 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 870 MHz RF427: Brazil (ANATEL), 905/920 MHz