Realtime US GPS/GSM/GPRS Tracker Tracking System Device

• Dimensions: 65mm x 45mm x 17mm (1.8''*2.5''*0.65'')
• Band: 850/ 900/1800/1900Mhz or 900/1800/1900Mhz
• Network: GSM/GPRS;
• GPS Chip: SIRF3 Chip;
• GPS Sensitivity: -159dBm;
• GPS accuracy: 5m;
• Weight: 50g;
• Time to First Fix: Cold status 45s, Warm status 35s,Hot status 1s;
• Car Charge: 12-24V input, 5V output;
• Wall Charger: 110-220V input, 5V output;
• Battery: Chargeable Changeable 3.7V, 1000mAh Li-ion battery;
• Standby Time: 96 hours;

What is GPS?

The Global Positioning System (GPS) is a satellite-based navigation system made up of a network of 24 satellites placed into orbit by the U.S. Department of Defense. GPS was originally intended for military applications, but in the 1980s, the government made the system available for civilian use. GPS works in any weather conditions, anywhere in the world, 24 hours a day. There are no subscription fees or setup charges to use GPS.

GPS satellites transmit signals to equipment on the ground. GPS receivers passively receive satellite signals; they do not transmit. GPS receivers require an unobstructed view of the sky, so they are used only outdoors and they often do not perform well within forested areas or near tall buildings. GPS operations depend on a very accurate time reference, which is provided by atomic clocks at the U.S. Naval Observatory. Each GPS satellite has atomic clocks on board.

What is GSM?

GSM (Global System for Mobile communication) is a digital mobile telephone system that is widely used in Europe and other parts of the world. GSM uses a variation of Time Division Multiple Access (TDMA) and is the most widely used of the three digital wireless telephone technologies (TDMA, GSM, and CDMA). GSM digitizes and compresses data, then sends it down a channel with two other streams of user data, each in its own time slot. It operates at either the 900 MHz or 1,800 MHz frequency band.

GSM is the de facto wireless telephone standard in Europe. GSM has over one billion users worldwide and is available in 190 countries. Since many GSM network operators have roaming agreements with foreign operators, users can often continue to use their mobile phones when they trave to other countries.

What is SMS?

We always send the SMS to our friends and family. SMS (Short Message Service) is a protocol for sending and receiving text messaging over digital cellular networks, including TDMA, CDMA, iDEN, and GSM networks. SMS messages are limited to 160 characters.

What is GPRS?

User could use GPRS to connect to internet with cell phone or laptop wireless.

GPRS (General Packet Radio Service) is a specification for data transfer on TDMA and GSM networks.GPRS utilizes up to eight 9.05Kb or 13.4Kb TDMA timeslots, for a total bandwidth of 72.4Kb or 107.2Kb. GPRS supports both TCP/IP and X.25 communications

Google Map & Google Earth

I think maybe most pepole know this. It brought us so many exciting things.

Mapinfo

For consumers, this company maybe not famous. but in the GIS (geographic information system) industry, it's a leader for the map software. Many company who drawing the map with their software and map style.

Micorsoft Map

Everybody know Micorsoft for windows, but not most people know their map. We hope they can make it perfect as the windows.

Gamin Map

Gamin is another leader of the navigator. Many car owner know this and his map is not same as above, it's more like a small software to install to the navi device.But this map can not be remotely updated. Navigator is a so pop device, in the furture, we think there will be a new kind of combined map with these.

For more infomation about these, please see our blog. We will put them together and update every week..