xbee is a wireless communication device from digi.com that uses ZigBee protocol. “ZigBee is a specification for a suite of high level communication protocols using small, low-power digital radios based on the IEEE 802.15.4-2003 standard for wireless personal area networks (WPANs), such as wireless headphones connecting with cell phones via short-range radio. The technology defined by the ZigBee specification is intended to be simpler and less expensive than other WPANs, such [...]

This is the wireless version of the origianally wired JoySlippers. Using Xbee Direct (Multipul Xbee - Xbee- comp) communication connection, rather than spiral telephone cable.

Based on the wired Tilt Sensing Bracelet, this version uses Xbee Direct (Xbee-Xbee) communication connection to send the digital data from the tilt sensing bracelet to a feedback bracelet which has an LED display. LEDs light up according to where the tilt sensor is making contact.

There are many ways to do wireless communication. When developing wearable technology project, it tend to come in play. At the moment, xbee is our favorite, although there are many other ways to do wireless communication.

Sparkfun made a great comparison on wireless modules. 
Sometimes you do not need large data rate, or you need something that [...]