Posts Tagged ‘bluetooth’
WiFi jammer, bluetooth jammer, and wireless cell phone signal blocker are all built into oneunit. Suitable for worldwide use.
This cell phone signal blocker transmits on three primary frequencies to block all nearby. WiFi network activity, bluetooth devices, and wireless spy camera and audio signals.
Conduct your company presentation, meeting, worship service, legal proceedings, or other important activities with security and peace of mind. When the cell phone signal blocker is turned on, you have a 20 meter radius of security, and when you turn off the cell phone signal blocker, all the wireless network activity will automatically be re-established.
Prevent being filmed on covert cameras or recorded by wireless audio devices.
The technologies of WiFi, bluetooth, and cell-phone jamming are illegal in some countries and perfectly legal in others. In many countries, the legality depends on the application, with jamming applauded and protected where it prevents public nuisances or promotes safety, and prohibited and prosecuted when frivolous or vindictive. As you can imagine, there are a lot of legal gray areas; the technology and laws are still evolving.
Bluetooth and most WiFi signals operate on the 2.4 GHz band according to IEEE 802.11 standards. Most everyday cordless phones work on the same 2.4GHz frequency. With a little tweaking you can turn a cordless phone into a cell phone signal blocker.
You can jamme a WiFi or Bluetooth signal by using the following items:
- a 2.4 GHz cordless phone
- a CD-R (or DL DVD-R for longer range)
- speaker wire
- duct tape
- screwdriver
- scissors
- In: trends
- 6 Comments
Do you still remember wristwatches?
With the surge in smartphones and their instant access to time and other information, fewer people seem to wear a watch these days. However, bluetooth will bring a bright future for wristwatches.
Bluetooth 4.0 will bring a bright future to wristwatches
Thanks to the Bluetooth 4.0 specification approved. It specifies ways for making low-power wireless network connections over short distances.
That means a watch or other device with a standard coin-cell or “button” battery that is worn on a wrist, kept in a pocket or worn on a necklace could communicate with a person’s smartphone or laptop. Using the wireless connection, the watch could display data received from the larger device, Bluetooth Special Interest Group (SIG) Executive Director Michael Foley said Wednesday.
All sorts of small, low-power devices could rely on Bluetooth 4.0, including building sensors, laptops, fitness devices and TV and stereo remote controls, he said.
But the specification has sparked particular interest by watchmakers, who have seen young people, mostly between the ages of 14 and 30, give up their watches and telling time from a phone.
The specification opens up new categories of Bluetooth devices. You could replicate your phone on your watch for caller ID information or to activate a music player.”
Several watchmakers in Asia have expressed interest to the Bluetooth SIG about incorporating Bluetooth 4.0 in watches, which could begin appearing in 2011.
Bluetooth 4.0 uses less power than earlier versions by shutting down the Bluetooth radio as much as possible between uses and by reducing the number of signal “trips” required to set up and keep a connection between devices. Earlier versions of Bluetooth required several such trips; that number has been reduced to only one or two in Bluetooth 4.0, he said.
As for other uses, Bluetooth 4.0 could be used with sensors in a star topology where one or more of the sensors communicates with a central radio or controller. (Since the spec doesn’t allow sensors to pass data directly to each other, a different type of “mesh” design isn’t supported.) Star topologies with Bluetooth 4.0 could be used, for instance, by a company to take readings from thermostats or motion detectors.
Bluetooth 4.0 is also expected to compete against the Zigbee Alliance’s low-power networking specification in TV remote control and related devices.
In the meantime, several manufacturers have introduced wireless wrist watch cell phone based on cellular wireless connections, not Bluetooth. For example, LG Electronics showed a Touch Watch Phone at CES in 2009.
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