[IC]：SI4438

[Frequency]：425~450.5MHz

[Power]：10~20dBm

[Distance]：2.5km

[Interface]：UART

[Weight]：Weight

[Introduction]：E30-433T20S3 is a UART module based on Silicon Labs' SI4438. It features half-duplex with transparent transmission, SMD packing, TTL level output, WOR and 433MHz working frequency. This product has been mass-produced and can be used in a wide range of environments and industries.