Key Chain GPS Tracker with free web platform service for person

3. SOS function: Press the SOS button and the GPS tracker will send a help alert and exact location to the authorized cell phone numbers for immediate rescue

4. Excess speed alarm: The tracker will send the excess speed alert to the authorized cell phone numbers when it is excess speed.

5. Low-battery alarm: It will send an alert to the authorized cell phone numbers when the tracker is low battery.

6. Two-way talking communication: You can talk with the tracking target via the GPS tracker just like a cell phone and also can listen to the sound around the GPS tracker in 3 meter secretly.

Specification:

Content	Specs.
Dimension	70.7mm x 42.9mm x 20.1mm
Weight	40g
Network	GSM/GPRS
Band	900/1800Mhz or 900/1800/1900Mhz or 850/900/1800/1900Mhz
GPS chip	SIRF3 chip
GPS sensitivity	-159dBm
GPS accuracy	5-20m
Cold start	42 sec.
Warm starts	35 sec.
Hot start	1 sec.
Charger	input110-220V /output 5V
Battery	Chargeable 3.7V 860mAh Li-ion battery
Operation Temp.	-20°C to +55°C
Humidity	5%--95% non-condensing

Q: How to close millet 3 GPS locator: In the phone's drop-down bar, there is a switch bar, which can be more than a small function button, which has a GPS positioning button, a little off, and then click on the open.Or in the "Settings", the point of "all settings", which has a "location service", "GPS satellite positioning" off the line.Hope can help you.

Q: How to detect whether the car installed jgps locator: Send in the work of the positioner is GPS signal, you usually have that kind of mobile phone ornaments, that can see signal lights.

Q: At present, the global positioning system (GPS), vehicle positioning accuracy can be increased to less than 3 meters, if so, what is the theoretical basis? If not, what is the reason?: Can, this is according to the number of vehicle GPS terminal at the same time you receive the satellite's decision, the minimum can simultaneously receives 4 satellites, because the satellite velocity and the distance between the calculate your position according to the distance, while receiving satellite positioning accuracy of the number, the more accurate. The GPS locator in general can be simultaneously received about 6, about 3 meters error is easily available, many cases can do 0 error. I hope you understand that.

Q: GPS locator tracker is always in the offline state is how to send text messages are appropriate. Send text messages back. WeChat or this.Baidu is the time to look at the map display offline: A, GPS locator why show offline?1, the device is turned off or power off; call the card number to check the power off and check the power indicator light;2, the device does not have a mobile phone signal; call card number can not be connected;3, SIM card arrears, GPRS service expires or package changes; call card prompt stop

Q: Phone can not locate GPS: No Rev GPS determine the GPS module damage to determine the brush bar

Q: Taobao to buy, the brand is the star GT02S, I was full of an electric car, opened only once, put a few days at home did not open, the results of last night to open the door even halfway out of the electricity, and hurt me back to the cart -!: I use the tanbit GPS locator W1 type, power consumption can also be common mode current: <10mA (12V), and when I'm not riding to set out, the standby battery inside the equipment, almost half a month, this thing is to own more care, can different devices, power consumption don't like it, I hope you can help.

Q: My friend bought a car to install satellite positioning system I am interested in my friend explained that I would like to ask who knows the professional interpretation (product principle) who knows who: It can be seen that the role of the GPS navigation satellite system is to continuously transmit navigation messages. However, because the user receives the clock and satellite machine using a carrier clock may not always synchronized, so in addition to the 3D coordinates of X, y, Z users, but also the introduction of a t that is the time difference between the satellite and the receiver as unknown, and then use the 4 equation the 4 unknowns out. So if you want to know the location of the receiver, at least to receive the signal of 4 satellites.The GPS receiver may receive for accurate timing information to nanosecond time; for forecasting ephemeris in the next few months which the approximate location of the satellite; used to calculate the required positioning satellite coordinates of the broadcast ephemeris, the accuracy of several meters to tens of meters (each satellite is different at any time change) and GPS system information; such as satellite status.The GPS receiver can get the distance from the satellite to the receiver by the measurement of the code, because it contains the receiver satellite clock error and atmospheric propagation error, it is called the pseudo distance. The pseudo distance measured by the 0A code is called the pseudo distance of the UA code, the precision is about 20 meters, the pseudo distance measured by the P code is called the pseudo distance of the P code, and the precision is about 2 meters.

Q: If the use of GPS positioning products which brand is good?: Second questions;The proposed use of Beijing Lei Zhaoan Technology Co., Ltd. R & D and production of the focus of the old air defense lost products "coordinates", the positioning performance of a stable, full power can be used for about three days, small size. I used it for my father. All aspects are good, so I recommend to you. Hope to solve your problem.

Q: The difference between the built-in antenna and external antenna of GPS positioning equipment: External antenna: separate equipment and antenna device consists of a host, a signal line, power line, this kind of equipment for external signal line, can be placed closer to the sky outside the range, so the signal and stability will be much better, the accuracy will be better.

Q: What is the positioning mode of the UUGPS tracking locator?: This brand of products is produced in Shenzhen, China Science and Technology Industrial Co., ltd.!!!

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