This module uses the newest 2.4GHz transceiver from Nordic Semiconductor, the nRF24L01+.
This transceiver IC operates in the 2.4GHz band and has many new features!
Take all the coolness of the nRF2401A and add some extra pipelines, buffers, and an auto-retransmit feature - very nice!
 

Please note: We now populate these boards with the nRF24L01+.
The '+' version of the IC has improved range, sensitivity, and data rates.
The command set is backward compatible with the original nRF24L01.

Dimensions: 0.8x0.9"

 

Features:

• On-board 3.3V LDO Regulator (3.3 to 7V supply allowed)
• On-board ceramic 2.4GHz Antenna
• 100m Range at 250kbps
• 250kbps to 2Mbit Data Rate
• Auto Acknowledge
• Auto Re-Transmit
• Multiceiver - 6 Data Pipes
• 32 Byte separate TX and RX FIFOs
• 5V tolerant input pins
• Software selectable channel from 2400MHz to 2525MHz (125 Selectable channels)
• Minimum number of external components
• Pins broken out : VCC, CE, CSN, SCK, MOSI, MISO, IRQ, GND
• Lots of application notes and support on Nordic Semiconductor Website

Documents:

• Schematic
• Eagle Files
• Nordic VLSI website
• nRF24L01 Datasheet
• Great Nordic tutorials
• mbed Example
• Example PIC Code