1-channel photoelectric isolation digital input and 1-channel relay digital output. Supports 433MHZ LORA wireless transmission, reducing the need for communication wiring. Utilizes MODBUS RTU protocol for reliable communication. Wireless remote control function extends the switching signal transmission distance while minimizing wiring requirements. Configuration and permanent parameter setting via a dedicated host computer, compact metal casing with vertical installation and rail card holder for easy mounting, ideal for PLC control, industrial automation, environmental monitoring, and other MODBUS RTU compatible systems. Communication: MODBUS RTU over 485 serial and LORA wireless. Frequency: 433MHZ for LORA transmission. Installation: Vertical with rail card holder. Input/Output: 1-channel digital input, 1-channel digital output. Power: Anti-reverse connection design. Color: Black Material: Metal. (The product printed words may vary depending on the batch, but this does not affect use) Color: Black Material: Metal Specification: 10m antenna Package Contents: 2*LORA Wireless Module 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.