[Frequency]：425~450.5MHz

[Transmit power]：30dBm

[Communication distance]：6km

[Interface]：UART

[Introduction]：E31-433T30D is a 433M DIP wireless serial port module (UART) with AXSEM AX5243 RF chip imported from Switzerland, half duplex, transceiver integrated, transparent transmission mode,425~450.5MHz frequency band (default 433MHz),TTL level output with air wake-up function (ultra low power consumption).