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!

Features:

• On-board 3.3V LDO Regulator (3.3 to 7V supply allowed)
• On-board ceramic 2.4GHz Antenna
• 50m Range at 1000kbps
• 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:

• Nordic VLSI website
• nRF24L01 Datasheet
• nRF24L01 ( LPC2148 / PIC18F452 ) tutorials 
• Using nRF24L01 and RFL remote to control 4-wheel robot
  

Software:

• Example PIC Code
• Example AVR Code (PDF doc)
• nRF24L01 AVRLib (originally written for ATMega168 and ATMega8, we also used it on Mega644)

Dimensions: 0.8x0.9"