This is a 433MHZ SX1278 Wireless Transmitter and Receiver RF Module IoT Transceiver. CDSENet E32-433T30DT UART is a 1W wireless transceiver module with LoRa spread-spectrum technology, operates at 410~441MHz (Default: 433MHz), based on originally imported RFIC SX1278 from SEMTECH, transparent transmission is available, TTL level.