Transceiver Headsets

How Bluetooth Works

Bluetooth technology for cellular phones is a form of short-range wireless communication device that allows two electronic devices to work without cables and wires. This means that you are able to have a cell phone conversation by way of a headset, or you can use a mouse for your smart phone, without having to hook these additional devices up with wires. All of the devices work through the same core system – the Bluetooth technology.

Bluetooth works using a physical layer referred to as the Bluetooth RF transceiver. This operates within the unlicensed ISM band which is centered at 2.4 gigahertz. Two point four gigahertz is the same range of frequencies which are utilized by Wi-Fi and microwaves). The very foundation of the system utilizes a transceiver which is capable of hopping frequencies in order to prevent fading and interference.

RF topology – also known as start topology – is used within all Bluetooth devices. When a group of such devices are synchronized together, the grouping is referred to as a piconet, which includes a master device and up to seven active slave devices. Further slaves may also be included, though they cannot also be actively participating in that network. However, one device may be applied in more than one piconet and can be either a master or a slave.

Within piconets, the actual radio channel that is used is shared among the synchronized devices in the group and are set to a common clock as well as a common pattern for frequency hopping. It is the master device that sets the pattern for the synchronization.

For example, when the master device is the cellular phone, all of the other devices within that phone’s piconet are referred to as the slaves. These slaves may be GPS receivers, an MP3 player, a headset, a car stereo, or any of the many other forms of Bluetooth enabled devices currently available. The master device – your cell phone – then sets the frequency hopping patterns for all of that piconet’s devices.

Naturally, it is quite a bit more complicated than this, and with the added securities that are becoming necessary, the algorithms for Bluetooth technology will only become more complex over time. However, it will ensure that our music, headsets, and other wireless devices continue to work just as we want them to.

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Hiphone V919 Dual Sim Card Cell Phone

V919 phone
Hiphone V919 dual sim card cell phone is a dual sim card mobile phone equipped with 3.5 inch touch screen and support TV function you can use it as a mobile tv set to watch your favourite programme.V919 built in compass software like iphone 3GS`s gravity software. high resolution quality camera out put size max 1600*1200 2.0 MP.Reasonable price and high quality is your best choice for this month. .

V919 dual sim card compass software TV 3.5 inch touch scren cell mobile phone
This phone will work with GSM network 850/900/1800/1900 mHz.

Hiphone V919 dual sim card cell phone is a dual sim card mobile phone equipped with 3.5 inch touch screen and support TV function
you can use it as a mobile tv set to watch your favourite programme.V919 built in compass software like iphone 3GS`s gravity software. high resolution quality camera out put size max 1600*1200 2.0 MP.Reasonable price and high quality is your best choice for this month.

Hotspot

Built in compass software
Dual sim card dual standby
Analog TV(TV free)
Bluetooth A2DP
JAVA 2.0
E-book reader
Gravity inducer
Slide to unlock
Schedule FM record
Super slin body design
FM radio(can output voice)
Slide to turn pages(4 pages)
Dual cameras with flash lamp
Support TF card extend to 8GB Max
Handshaking:swtich to wallpaper
Language:English/French/Spanish/Portuguese/Italian/Vietnamese/Russian/Arabic/Thai/Indonesia/Chinese

Features

3.5 inch touch screen; VGA PX: 640*480
500 group contacts
T-Flash Card Suphporting,built in 8184K memory in phone, support extend TF card to 8GB
2.0 Mega pixel camera for Picture & Video capability,solomobi.com test put out biggest size is 1600*1200
Stereo Loud speaker, 64 chord ring tone
MP3 & MP4 player
GPRS & WAP connectivity, MMS Transceive
U disk support function to keep the information storage
Bluetooth
Voice record
Calendar,To do list,Alarm,World Clock,Spotwatch
Caller picture,caller Ring Tone,caller video
Telephone directories:500 groups of contacts, support incoming call with big head sticker,group ring an Messages &Multimedia messaging:SMS, support MMS
Schedule power on/off: support to start/close under set time
Alarm clock:5 groups, support alarm clock when machine’s closed, can set from Monday to Sunday
Games: 3 common games,JAVA games
More information: MP3/MP4/ Handsfree/SMS group sending/ Bluetooth/Handwritting input/ GPRS download/
MMS/GSM/E-book/calendar/alarm clock/calculator/Currency converter/Radio/Dual sim cards standby/Worldclock/To do list/Unit converter/Pic edit/Composer…
Network GSM 900/1800MHZ
SIZE ( L * W * H ) 113*61*12mm
BATTERY Lithium Batteries:2000mAh
COLOR black
STANDBY TIME About 240-360Hours
TALKING TIME About 3-5Hours

Package Includes:
1xPhone
2xBatteries
1xStereo Headset
1xBattery Charger
1xData Cable
1xEnglish Manual

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