Bluetooth has a lot to offer with an increasingly difficult market place. Bluetooth helps to bring with it the promise of freedom from the cables and simplicity in networking that has yet to be matched by LAN (Local Area Network).
In the key marketplace, of wireless and handheld devices, the closest competitor to Bluetooth is infrared. Infrared holds many key features, although the line of sight it provides doesn’t go through walls or through obstacles like that of the Bluetooth technology.
Unlike infrared, Bluetooth isn’t a line of sight and it provides ranges of up to 100 meters. Bluetooth is also low power and low processing with an overhead protocol. What this means, is that it’s ideal for integration into small battery powered devices. To put it short, the applications with Bluetooth are virtually endless.
Disadvantages Bluetooth has several positive features and one would be extremely hard pressed to find downsides when given the current competition. The only real downsides are the data rate and security. Infrared can have data rates of up to 4 MBps, which provides very fast rates for data transfer, while Bluetooth only offers 1 MBps.
For this very reason, infrared has yet to be dispensed with completely and is considered by many to be the complimentary technology to that of Bluetooth. Infrared has inherent security due to its line of sight.
The greater range and radio frequency (RF) of Bluetooth make it much more open to interception and attack. For this reason, security is a very key aspect to the Bluetooth specification.
Although there are very few disadvantages, Bluetooth still remains the best for short range wireless technology. Those who have tried it love it, and they know for a fact that Bluetooth will be around for years to come.
Archive for February, 2010
Disadvantages And Advantages
Thursday, February 18th, 2010Wireless Surveillance Combo with 4 Black Cameras (PAL)
Wednesday, February 17th, 2010
Wireless Surveillance Combo with 4 Cameras (PAL). This wireless surveillance combo is perfect for keeping your eyes and ears on your home or small business.
If you are looking for an effective and economical surveillance system for your home or small business, look no further. This Wireless Surveillance Combo with 4 Cameras for the EU can provide the wireless surveillance solution you need at a price you can afford. With four cameras and a wireless receiver, this Wireless Surveillance Combo provides a range of flexible surveillance solutions. Expecting unwelcome guests? Install a camera over the door and screen visitors before they even knock. Need to prevent theft in your shop? Put a camera in each corner and catch them in the act. Finding it difficult to keep an eye and an ear on all of your employees? With easy to install cameras, high-quality audio and video, and the ability to link to a TV monitor, the uses of this Wireless Surveillance Combo are limited only by your imagination.
Setting up your own wireless surveillance system is quick and simple. The four wireless cameras are easy to install and require only a power source. With two rotatable joints and a viewing distance of up to 15 meters, the cameras can be easily aimed at any location, no matter whether they are installed on the wall, floor, or ceiling. The wireless receiver can be positioned at a distance of up to 15 meters from the cameras and can connect to a TV through AV Out so you can monitor your cameras on a large screen.
Tonight, rest easy with the peace of mind that comes with knowing that you have secured your home or small business without endangering your wallet. Tell your friends you got a great deal on your Wireless Surveillance Combo from the leader in high-quality, low-price electronics: Chinavasion.
At a Glance…
4 wireless cameras and 1 wireless receiver AV out lets you connect to a TV monitor Transmits high quality audio and video
This product uses PAL color system. If you need a NTSC unit then please order CVD-42A203X4-NTSC.
Manufacturer Specifications
Receiver Specifications
Receiving Frequency: ISM 2400~2483Mhz Intermediate Frequency: 480Mhz Frequency Stabilization: +/-100Khz Demodulation Mode: FM Antenna: 50ohm SMA Receiving Sensitivity: 38dB Audio Output: 1Vp-P@600 Dimensions: 120mm x 99mm x 30mm (L x W x D) Manual or Remote Controlled Four Channels Available Channel Scan and Channel Skip for Multiple Cameras
Camera Specifications
Image Device: 1/3 Inch OmniVision CMOS TV system: PAL 628(H)x568(V) Horizontal Definition: 380TV Line Angular Field of View: 45deg (f=6mm) Minimum Illumination: 3.0Lux (F1.2) Synchronization System: Internal Scanning Freq(H): 15.625KHz PAL Scanning Freq(V): 50Hz PAL Backlight Compensation: Auto Electronic Shutter: 1/50(1/60)~1/100,000sec White Balance: Auto S/N Ratio: >48dB Gamma Correction: >0.45 Operation Temperature: -10~50 deg C Transmission Frequency: ISM 2,400~2483MHz Locked Frequencies Dimensions: 32mm x 25mm x 53mm (L x W x D) Built In Microphone Recommended Range for Objects: 1-8M (Max effective range 12M) Transmission Range: 15m without interference Manufacturer Ref: E56DCC641555 Catalog Ref: Security Cameras, Surveillance Kit, Wireless security camera set
Product Notes
Easily programmable to automatically switch from one channel to another at a touch of a button on the included remote control This set comes with 1 receiver and 4 cameras Each wireless camera has its own power source
Package Contents for CVD-42A203X4-PAL
4x Wireless Video Cameras 1x Wireless Video Receiver 5x Power Adapters, 100-240V (4x for cameras, 1x for receiver) 4x 9V battery power attachments for cameras 1x Remote Control 1x User Manual – English 2x AV cable
FAQ – Frequently Asked Questions
How far a distance can the cameras microphone pick-up audio?
The MIC can only hear clear audio up to 3 meters (max). Is it difficult to install?
Not at all! Just plug and go, all you have to do is select different channels on each camera by using the channel switch located the rear end of the wireless camera. Does the receiver also record video?
No. But it is simple to record video once you connect the receiver to a DVR or similar AV IN recording device (including media computers).
Visit the website: http://www.electronicschinawholesale.com
You will find much more. Current Reviews: This product was added to our catalog on Monday 13 April, 2009.
Hearing Aids
Tuesday, February 16th, 2010
There are more and more types and styles of hearing aid available today, as technology becomes more advanced and hearing aid components become ever smaller. What this also means is that hearing aid prices will vary hugely.
Hearing aids can be analogue or digital, but it’s worth remembering that hearing aid prices will differ significantly within the analogue range and also the digital hearing aid ranges.
Prices of digital hearing aids can vary from as little as £300 or £400 to over £2,000 per hearing aid. When considering a hearing aid you must first seek professional advice and learn about your individual hearing loss and what hearing aid solutions are available to help.
It may be that with a mild hearing loss a more cost effective hearing aid will be suitable but this may not offer the benefits or smaller hearing aid devices or in-the-ear hearing aids.
The best hearing aids will almost always be branded hearing aids offered by the leading hearing aid manufacturers such as Oticon, Phonak, Siemens, GN Resound and Widex.
Non branded hearings can be suitable but it is difficult to know what you are buying and whether your hearing aid will stand the test of time.
There are four main types of hearing aid, open ear hearing aids, which can also incorporate RITE (receiver in the ear) technology, BTE (behind the ear), ITE (in the ear), and CIC (completely in the canal) digital hearing aids. There are benefits and disadvantages of each type, but the one with the fewest disadvantages is the open ear RITE.
Most people with hearing loss can benefit from an open ear hearing aid, but severe and profound losses may find that BTE digital hearing aids are more suitable. If you are concerned about your hearing go for a free hearing test from a local hearing aid dispenser first. Phonak is one of the world’s leading hearing aid manufacturers and provides some of the best hearing aids available for all types of hearing loss and for all budgets. So if you are considering a hearing aid ask about Phonak hearing aids.
For those who want to try a discrete but varatile hearing adi ask about Phonak Audeo Yes. It’s a really tiny, light and discrete hearing aid, the Audeo Yes hearing aid has several features that make it an excellent choice. CrystalSound is the core of the hearing aid processor. It digitally amplifies the subtle, high-pitched sounds critical to understanding speech and makes sure nothing gets lost. Digital SurroundZoom is one the industry’s best directional microphone systems. All packaged into a cool, Red Dot Design Award winning form that combines style with ergonomics and practicality. The Audeo Yes shape is designed to allow optimum placement of the dual microphones on the hearing aid for the best performance in noise.
Also worth considering Oticon hearing aids such as Epoq the top of the range digital hearing aid that has binaural processing and can even communicate with mobile phones and other electrical devices. If you are considering a lower cost option consider Oticon Dual which also has amazing processing power and some great features.
With so many digital hearing aids available it’s difficult to know where to start so best seek advice from a hearing care professional.