The modules makes it simple to use with microcontroller's UART to to create bidirectional RS485 networks.

Specifications:

• On-board MAX485 chip, low-power, Slew-Rate Transceiver 
  
• RS485 is brought out to 5.08 (mm) pitch 2P terminal for easy wiring RS-485 communication
  
• All pins can be controlled by the microcontroller
  
• 120R terminating resistor on board
  
• Power LED Indication
  
• 2.54mm Pitch interfacing.
  
• Working voltage: 5V
  
• Board size: 44 (mm) x14 (mm)