1. Ultra-long wireless transmission distance of 2km in an open environment 2. 415MHZ-450MHZ adjustable transmission frequency 3. Continuous data transmission in half-duplex mode 4. Support RS485 communication interface The RS485 Lora wireless serial port transceiver communication module uses STM32F103C8T6 as MCU, with onboard SP485 chip and SX1278 communication chip. Through the 433MHz transmission frequency, it can achieve ultra-long-distance wireless transmission of 2km in an open environment, realize continuous data transmission between the transmitter and the receiver in half-duplex mode, and support RS485 interface communication. The module has the characteristics of ultra-low power consumption, strong anti-interference ability, long transmission distance, and stable communication. Different batches may have different appearances, but not affect the use Colour:Blue Material:PCB+Electronic component Package Contents: 2 x RS485 Lora Wireless module 2 x Pin Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.