This is the XBee XB24-Z7WIT-004 module from Digi. Series 2 improves on the power output and data protocol. Series 2 modules allow you to create complex mesh networks based on the XBee ZB ZigBee mesh firmware. These modules allow a very reliable and simple communication between microcontrollers, computers, systems, really anything with a serial port! Point to point and multi-point networks are supported.

Features:

• 3.3V @ 40mA
  
• 250kbps Max data rate
  
• 2mW output (+3dBm)
  
• 400ft (120m) range
  
• Built-in antenna
  
• Fully FCC certified
  
• 6 10-bit ADC input pins
  
• 8 digital IO pins
  
• 128-bit encryption
  
• Local or over-air configuration
  
• AT or API command set