E90-DTU(400SL47) LoRa module remote communication SX1268 radio frequency chip 485/232 wireless data transmission radio relay network [Interface type]:RS232/RS485 [Working frequency]:433.125M [Communication distance]:70km [Product size]:160*137*44mm [Product weight]:846.2g±5g [Introduction]:E90-DTU (400SL47) is a...