SI4463 Low Price 425 525MHz RF Chip Rf Chip Type Wireless & Rf Chip IOT wireless data transmission [IC]：SI4463 [Frequency]：425∥525MHz [Power]：20dBm [Distance]：2.5km [Size]：20*14mm [Introduction]：E30-400M20S is a hardware module (SPI) based on the SI4463 RF chip imported from Silicon Labs. It is a half-duplex, SMD integrated transceiver with transparent transmission available. With working frequency band 425∥525MHz, transmitting power 100mW, it is suitable for a variety of environments. https://www.cdebyte.com/products/E30-400M20S(4463)