The Ra-01SC module is used for ultra-long-range spread spectrum communication, and its RF chip LLCC68 mainly uses LoRa remote modem for ultra-long-range spread spectrum communication, with strong anti-interference and low power consumption. With the help of LoRa modulation technology, LLCC68 has a high sensitivity exceeding-129dBm, a power output of 22dBm, a long transmission distance, and high reliability. At the same time, compared with traditional modulation technology, LoRa modulation technology also has obvious advantages in anti-blocking and selection, which solves the problem that traditional design schemes cannot take into account distance, anti-interference and power consumption at the same time. Applications are used in: intelligent instruments, supply chain and logistics, home building automation, security systems, remote irrigation systems, etc.