chenmcmc013

I had find many products about Full Color Screen Video Door Phone with IR Low Light Camera. Features:1) High quality video audio entry phone 2) Unit for inside has 330 TV-wire high resolution color video display and handsetfor speaking 3) Outside unit has 1/3 inch camera inside sturdy weatherproof housing plus 6 IRLEDs for night illuminationSpecifications:1) Display resolution: 330 TV wire 2) Camera: 1/3" color 3) Lens and angle: F6.0, c 58 degrees 4) Functions in low light down to 1.5 LUX 5) Light source: 6 infrared LEDs 6) Intercom phone (wired) 7) Power supply: type A: DC18V, type B: AC 220V 8) Camera resolution: f6.0, about 58 degrees viewing angle 9) Power consumption: standby 130mW, working 14W 10) Outside unit size: 125 x 93 x 32mm 11) Inside unit size: 220 x 195 x 50mmSearch chinavasion.com for this product code: CVAJM-908T Full Color Screen Video Door Phone with IR Low Light Camera mo

And you can see more from gsm cellphones buy gsm phone dual sim card holder cell phone lanyard cartoon cell phone cordless speaker phones imate mobile phones 2 lines phone cell phone handsfree
(Redirected from Tri band)
Tri band phones (also known as tri-band or triband) are mobile phones that support three frequency bands. Having more than one frequency in one device is useful to enable roaming between different countries and continents. Tri-band technology is slowly becoming the norm among many manufacturers.
Contents
1 2G
2 3G
2.1 Devices
3 See also
4 External links
//
2G
Further information: GSM frequency bands
Various countries use different frequency bands for their mobile networks and a triband phone can be used on three of these bands, generally speaking, chosen to favour two of the home country's bands, and one for roaming in other countries.
GSM frequency bands used around the world:
850 MHz (In America)
900 MHz (In Africa, Europe, and many parts of Asia and Latin America)
1800 MHz (In Africa, Europe, and Asia and many parts of Latin America)
1900 MHz (In America)
2G Triband phones are mobile phones that support the GSM 900/1800/1900 MHz bands commonly sold in Europe, Asia and Africa, (for example the LG KE820 is a triband mobile phone that is sold in Europe, but works in big cities of America but not so well in suburbs and rural areas).Or alternatively the 850/1800/1900 bands (commonly sold in the Americas). The Motorola V300 formerly carried by Rogers Wireless used a rare combination of 850/900/1900. A 2G Quad band (850/900/1800/1900) offers more coverage and is now quite common.
3G
Further information: UMTS frequency bands
UMTS / HSDPA devices operate in UMTS frequency bands 850/1900/2100 or 850/1700/2100 MHz:
2100 (downlink) / 1900 (uplink) for Europe and Asia (usually referred simply as W-CDMA 2100)
1900 / 850 (independently, for both the uplink and downlink) for America (e.g. AT&T)
2100 (downlink) / 1700 (uplink) for America (e.g. T-Mobile)
850 for Australia (Telstra NextG)
UMTS / HSDPA / HSUPA is a further evolution.
Note that being UMTS / HSDPA / HSUPA tri band doesn't mean that phone is a GSM / GPRS / EDGE tri band. An HSUPA tri band might not be a GSM at all. However nearly all HSDPA or HSUPA tri band are EDGE quad band too.
A 3G Quad band offers more coverage.
Devices
Some UMTS / HSDPA 850/1900/2100 tri band are already available:
Apple - iPhone 3G
ASUS -
BandRich - BandLuxe C100
Gigabyte - GSmart MS820, MS808, MS804, MD800
Glofiish (E-Ten/Acer) - Glofiish V900
HTC HTC TyTN, HTC P3600, HTC Advantage X7500, HTC Shift (Ultra-Mobile PC), HTC S420, HTC S630, HTC P4550, HTC P6500, HTC Touch Cruise
Huawei E800 Data Card (ExpressCard)
i-mate JASJAM, Ultimate series 5150 6150 7150 8150 9150 (all five available alternatively in 850/1700/2100 bands)
Nokia - E90? N85 Nokia 6124
Motorola - Motorola Atila
Palm - Treo 750 (UMTS only), Treo Pro
RIM - Blackberry Bold
Samsung - Samsung BlackJack II (UMTS only), Samsung BlackJack III?, Samsung i900 Omnia
Sony Ericsson PC300, Z750, K850i, W760i, C902, MD300
UBiQUiO - 503G
Some UMTS / HSDPA / HSUPA 850/1900/2100 tri band are already available:
HTC - HTC Omni
Huawei E270 Wireless modem (USB)
Novatel Wireless Merlin X950D ExpressCard
Option GlobeTrotter Express HSUPA, GlobeTrotter GT MAX HSUPA, GlobeSurfer iCON HSUPA, GTM380
Sierra Wireless AirCard 880 and the AirCard 881 (PC Card), AirCard 880E and the AirCard 881E (ExpressCard) and MC8780 and the MC8781 (PCI Express)
Sony Ericsson EC400g (plus GPS)
See also
3GPP
Cellular frequencies
Dual band
GSM frequency bands
Quad band
Roaming
UMTS frequency bands
External links
Frequency world map
HSPA website
Categories: Global System for Mobile communications
Hidden categories: Articles lacking sources from January 2008 | All articles lacking sources(and so on)

You can also see some feature products :

wifi sip phone cubic zirconia blue small cell phones moto cell phones decorative phones n93 phone replacement cell phone drawstring back pack stainless phone dual sim adaptor sidekick iii phone the newest cell phones rechargeable nimh battery pack psp bundle pack super sim tv cell phone wholesale gsm n91 mobile alarm clock phone bluetooth office phone lashing strap