[Introduction]：E30T-433T20S(125℃) is a high temperature wireless serial port module (UART) ,half duplex, integrated transceiver, transparent transmission, SMD type, TTL level output, working frequency band 4 25 ~ 4 50.5MHz , transmit power 100mW , can work in -40 ~ +125 °C environment, suitable for high temperatureoperation scenarios .