Low cost 4G wireless Lte router with RS232 or RS485 and SIM card

LOW COST HDRM100 L1  ONE LAN PORT 4G LTE Router/DTU• 1*LAN 10M/100M/1Gbitbps,• 1*RS232 or RS485,1*RS485, GPIOs(4*Digital or 2*Analog),SPI,I2C (Optional)  

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