http://www.engadget.com/2006/08/15/chronotechs-bluevoice-combines-wristwatch-headset/
Bluetooth Watches is offering a combination headset wristwatch that is the ugliest electronic device I’ve seen this week.
Bluetooth is the trade name for a radio-frequency standard that enables low-speed, short-range wireless network connections.
The short version: it’s a replacement for audio cables.
WiFi is much faster and has a longer range than Bluetooth, but Bluetooth requires less electrical power. Thus, Bluetooth is a good choice for small devices like mobile phones and headsets. Manufacturers can include Bluetooth features in their devices without adding a large battery and antenna.
Bluetooth is somewhat limited. While there are stereo Bluetooth headsets available that connect to PDAs, phones and iPods, these headsets don’t work with some computers.
Another major limitation of Bluetooth is its security features. Encryption is weak or non-existent in some implementations, and many users simply leave the Bluetooth settings wide open. This can allow a nearby hacker to gain access to a device.
Then again, because of the limited range and power used, a hacker would have to be within 20 meters of his victim in most circumstances.
