[IC]：SI4438

[Frequency]：425～525MHz

[Power]：20dBm

[Distance]：2.5km

[Size]：20*14mm

[Product weight]：1.5±0.1g

[Introduction]：E30-400M20S is a hardware module (SPI) based on the SI4438 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.