GF21 GPS tracker is a small, and portable device. It is used to track the location of people or objects or vehicles. It uses GPS technology to determine the precise location of the device and shares the location via GPRS network to the user’s phone or web tracking software. The GF21 is designed to be discreet and easy to use, making it a popular choice for tracking vehicles, assets and kids.

How does GF21 Work?

GF21 GPS tracker works by using a combination of GPS (Global Positioning System) and cellular network technologies. The device has a built-in GPS module and antenna so it can receive coordinates from satellites. Once the device gets the coordinates, it sends them to a remote server by using the cellular GPRS network.

The server then processes these coordinates (geo-coding) and makes it available to access through a smartphone app or web tracking software. The user can view the location of the GF21 tracker in real-time and set up geofencing alerts to receive notifications when the tracker enters or exits a specified area.

GF21 GPS tracker also has a built-in rechargeable Li-ion battery. Depending on tracking interval or usage, it can last for several days. The device is charged by a USB cable when power is low. With the SOS button, the user can send out a help message and call by pressing the button. With a microphone, the caller can listen to the voice around GF21, as well user can control the device to record the audio around the device.

GF21 Features

1 Accurate Location tracking by GPS LBS and WIFI

2 Live Location tracking on APP and Web

3 History traces playback on APP and Web

4 Remote voice monitoring/ listening-in with high definition silicon microphone

5 Remote audio recording on APP

6 Unlimited audio recording times

7 Auto audio recording when shock detected

8 Auto audio recording when voice is detected above 60 db

9 Geo-fence alarm to give alert when GF21 moves out the preset area

10 Built-in 300mah rechargeable battery

11 Low battery alarm

12 SOS alarm

GF21 Tracker Specifications

Positioning accuracy	10 – 50 meters
Memory support	Do not support. Have unlimited recording space on APP
Positioning accuracy	GPS+WiFi+LBS+AGPS=10-50 meters
Recording range	80 square meters
Platform view	SMS + APP + computer
Communication frequency	850 / 900 / 1800 / 1900MHz
Charging input	5V voltage
Working temperature	-20 – 85 Degree
Network standard	GSM / GPRS
Microphone	Buit-in for voice monitoring and audio recording
SOS button	Emergency alert
Backup battery	300mAh
Product size	26*13*43

GF21 GPS Tracker instructions manual

Per the below SMS commands, you can set up GF21 tracking device

SMS command list
Command Format	Function	Example
SL MT+TEL+#	Let device call preset number	SL MT15012404563#
SL LC	Check location	SL LC
SL CX	Check device ID, IP, Port APN	SL CX
SL APNapn,user,pass	Set APN	SL APNcmnet,,
SL RT	Restart device	SL RT
SL DP	Set Domain and Port	SL DPwww.gpspos.net#8700#
SL IP	Set IP and Port	SL IP104.243.132.242#8700#
SL XM	Into sleep mode	SL XM
SL HX	Wakeup	SL HX
SL SC	Set upload time interval	SL SC0,50
SL INTV	Set wakeup and sleep interval	SL INTV30,600

GF21 GPS Tracker Tracking APP

In market, there are two widely used tracking APP for GF21 tracking device. The first one is ZEROGPS, the other is 365GPS or 360GPS or 356GPS. Our GF21 works with ZEROGPS which supports voice recording, live tracking on Google Map, unlimited voice recording etc. 365GPS or 360GPS or 356GPS cannot show accurate location on Google Map. Their APP map just shows blank without address display. If you get device using 365GPS or 360GPS or 356GPS, it maynot work. Complain as below:

Search GF21 Tracking APP at Appstore or Google Play “zerogps” so as to download. It is free to download. All units bought from UniGuard enjoy life time free tracking service. No subscription charge.

GF21 GPS Tracker Voice Recording Test

GF21 has voice recording feature. The recorded voice either stores locally in TF card or on phone appplication. User can send command from APP to start voice recording at interval of 30 secs or command device to automatically do voice recording as long as there is shock or louder voice.

GF21 Review

Positive reviews: Good location accuracy, ease of use, and long battery life. It is very helpful in keeping track of their vehicles, pets, and children. Also, GF21 is small in size and discreet in design, making it easy to hide. What’s more, the real-time tracking feature is highly recommended by customers, as it is very useful in locating lost or stolen items. GF21 can do a clear voice monitoring nad vioce recording on APP.

Negative reviews: The device’s cellular coverage is small that it may not work in areas with weak or no network coverage. However, GF21 works excellently at place with good GSM coverage.

GF21 Wholesale Price

Uniguard has been in GPS tracking business for 15 years now. offer GF21 at very competitive factory price. Do not hesitate to contact us. Buy GF21 from Factory.

To buy GF21 online for self usage, please buy it from our aliexpress store safe and return guarenteed click GF21 Purchase