This is the very popular 2.4GHz XBee module from Digi. These modules take the 802.15.4 stack (the basis for Zigbee) and wrap it into a simple to use serial command set. 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. Note: If you are using these outside of Canada/US, please check with your local laws regarding radio communication. Note: If you want to using Zigbee protocol, please select a Zigbee radio instead. Performance: XBee-PRO Power output: 63 mW (+18 dBm) North American version Indoor/Urban range: Up to 300 ft (90 m) Outdoor/RF line-of-sight range: Up to 1 mile (1.6 km) RF LOS RF data rate: 250 Kbps Interface data rate: Up to 115.2 Kbps Operating frequency: 2.4 GHz Receiver sensitivity: -100 dBm (all variants) Networking Spread Spectrum type: DSSS (Direct Sequence Spread Spectrum) Networking topology: Point-to-point, point-to-multipoint, & peer-to-peer Error handling: Retries & acknowledgements Filtration options: PAN ID, Channel, and 64-bit addresses Channel capacity: XBee-PRO: 12 Channels Addressing: 65,000 network addresses available for each channel Power Supply voltage: XBee-PRO: 2.8 - 3.4 VDC Transmit current: XBee-PRO: 215 mA (@ 3.3 V) Receive current: XBee-PRO: 55 mA (@ 3.3 V) Power-down sleep current: XBee-PRO: