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GPS Trackers

GPS trackers show you the best routes to avoid traffic congestion. They also prevent you from getting lost by giving you directions to your destination. Interested to learn how GPS works? Read on below to find out.

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Mini A8 Global GPS Tracker Locator Gsm/gprs 4 Bands Tracking SOS Button for Cars Kids Elder Pets
HK$ 118.00
Tomtop

Features:Mini global Gsm/gprs real time GPS tracker, use standard GSM SIM card (Not included).GSM Frequency suppport 850/900/1800/1900Mhz.Location Inquiry: If no one is authorized, any mobile phone can send DW to check the tracker's location (you will receive a SMS with address or Url). Once any authorization is done, only the authorized users are able to obtain the location info.Platform Inquiry: Authorized mobile numbers can use the device ID and password in the authorization message to login the platform and query the position/path/electric quantity, etc. Also, users can go to //e5ex.com to download APP.Voice Callback: Call the SIM card number in the tracker, hear the sounds for 3s after get through, then hang up, and the number is set successfully. When there is a sound above 45db within 10 meters around the tracker, it will automatically call the number which you set before.Emergency Alarm: Send SOS to the device, once it is set successfully, press SOS key for more than 3 seconds, the device will call the set number directly.Maximum 4 cell phone numbers are allowed to admin the tracker.Mini size and ultra light weight.Simple operation and stable performance.Built-in rechargeable Li-battery, low power consumption and long standby time.Widely used for household monitoring, children/the elder/pets' care, the trace for cars or other possessions.

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Mini Portable Real Time GPS Tracker LBS WiFi Positioning Anti-Lost Alarm GPS Tracking Locator for Vehicles Cars Motorcycles
HK$ 374.00
Tomtop

Features: Supports GPS/WiFi/LBS accurate positioning, and it will select the suitable positioning mode based on outdoor different environment. Supports setting electronic fence, when the tracker leaves your pre-set electronic fence, it will alarm to your phone App immediately. Supports remote listening through the phone App, and the voice surveillance function helps you hear what is happening around the tracking device. Supports historical tracking, the APP can query and retain information of 3 months, so you can check the historical moving route record anywhere and anytime. Supports overcharge protection/over-heating protection/short-circuit protection/over-current protection/over-voltage protection/overpower protection, safe to use. 3D streetscape function and real time tracking, allowing you find out the location of your car through the APP map. Mileage statistics function, checking the times of parked/speeding/alarm and the mileage through the APP within the pre-set mileage time horizon. Built-in high sensitive light sensor, and it will alarm to the binding phone once it is tore down unlawfully. Built-in Micro-SIM card slot and it supports GSM card(2G) and 4G card(compatible with 2G network). Easy to use, no need to cut your automobile wires, just insert into GSM card and through specialized phone APP then you can get GPS tracker's location anytime and anywhere. With strong magnetic, easy to install and adsorb to any magnetic surface on your car, not easy to fall off no matter how your car shake. Compact size, very portable, noiseless when working, easily to be concealed, and it works great for tracking cars and motorcycles. Supports voice recording, vibration alarm, speed alarm and low battery alarm.

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Portable Real Time GPS Tracker LBS WiFi Positioning GPS Tracking Device Locator Anti-Lost Alarm for Vehicles Cars Motorcycles
HK$ 538.00
Tomtop

Features: Supports GPS/WiFi/LBS accurate positioning, and it will select the suitable positioning mode based on outdoor different environment. Supports setting electronic fence, when the tracker leaves your pre-set electronic fence, it will alarm to your phone App immediately. Supports remote listening through the phone App, and the voice surveillance function helps you hear what is happening around the tracking device. Supports historical tracking, the APP can query and retain information of 3 months, so you can check the historical moving route record anywhere and anytime. Supports overcharge protection/over-heating protection/short-circuit protection/over-current protection/over-voltage protection/overpower protection, safe to use. 3D streetscape function and real time tracking, allowing you find out the location of your car through the APP map. Mileage statistics function, checking the times of parked/speeding/alarm and the mileage through the APP within the pre-set mileage time horizon. Built-in high sensitive light sensor, and it will alarm to the binding phone once it is tore down unlawfully. Built-in Micro-SIM card slot and it supports GSM card(2G) and 4G card(compatible with 2G network). Easy to use, no need to cut your automobile wires, just insert into GSM card and through specialized phone APP then you can get GPS tracker's location anytime and anywhere. With strong magnetic, easy to install and adsorb to any magnetic surface on your car, not easy to fall off no matter how your car shake. Compact size, very portable, noiseless when working, easily to be concealed, and it works great for tracking cars and motorcycles. Supports voice recording, vibration alarm, speed alarm and low battery alarm.

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Top GPS Trackers Price List 2018

Top 10 products Price Store
Garmin Edge 1030 HK$ 4,710.00 Amazon
Garmin eTrex 10 HK$ 799.00 Nzgameshop
Polar M460 HK$ 1,492.00 Amazon
Polar V650 HK$ 1,806.00 Amazon
Garmin Approach G8 HK$ 2,748.00 Amazon
Garmin eTrex Touch 35 HK$ 2,666.00 Onsport
Garmin eTrex 20x HK$ 1,570.00 Amazon
Garmin Drive 60 HK$ 1,413.00 Amazon
Garmin eTrex Touch 25 HK$ 2,154.00 Onsport
Garmin GPS 72H HK$ 481.00 AliExpress
Most Popular
Garmin Edge 1030

Available in Amazon HK$ 4,710.00 Go to Shop

How Does the GPS System Work

GPS has become a staple service that many Hong Kongns are utilising today. Many Hong Kongn drivers use GPS devices to guide them on the best routes to use to reach a designated destination. GPS systems are accessible via our smartphones and a variety of handheld GPS devices. Some cars also have come with built-in GPS systems for you to navigate your trips easily.

Despite being used almost every day, not many people know how the GPS works. Most people know that GPS, short for Global Position System, basically uses satellites to determine the position of your location and the destination you are heading to. Here is an in-depth insight into how the global positioning system (GPS) works:

Founding of the Global Positioning System

The Global Positioning System, also known as NavStar was built by the US military system and has been fully operational since 1995. The system was initially developed for military navigation but now anyone with a GPS device, be it a mobile phone or a handheld GPS unit, can receive the radio signals broadcasted by the satellites from outer space. The GPS system currently has 31 active satellites orbiting the Earth from 20,000 kilometres away, making two complete orbits a day. Not all are used though as some are spare satellites in case one malfunctions.

Concept Behind the GPS System

GPS uses a lot of complex technology to operate but the concept is relatively simple to understand. The satellites are arranged in such a way that no matter where you are on the planet, there will be at least four GPS satellites that are “visible” at any point of time. Each of these satellites will transmit information about its position and the current time at regular intervals. Your GPS receiver which will analyse and calculate the high-frequency radio signals emitted by the GPS satellites to determine the distance of the satellite based on how long it took for the messages to arrive. Once your device is able to calculate how far away at least three satellites are, it can pinpoint your location through a simple mathematical principle known as trilateration.

Trilateration

To understand trilateration, you need to imagine yourself standing somewhere on Earth with three satellites in the sky above you. If you are able to know the distance you are from one satellite, say Satellite A, then you will be able to build an imaginary circle with the distance you are from the satellite as the radius. By doing the same thing for satellite B and C, you can work out your location by defining a point where these three circles intersect. This is how your GPS receiver determines your location with the only difference is that it uses overlapping spheres instead of circles.

Although an approximate position can be determined with only three satellites but to improve accuracy and obtain precise altitude accuracy, having information from four or more satellites will be ideal. Planning to get yourself a GPS tracker? Brands like Garmin and OEM manufacture reliable GPS units that you can use to ensure that you reach your destination without any hassle.