1. Introduction
Thank you for choosing the TKSTAR TK818-4G 4G LTE GPS Tracker. This device is designed for real-time vehicle tracking, offering features such as precise positioning, multiple alarm functions, and fast charging capabilities. It integrates seamlessly into your vehicle's cigarette lighter port for easy installation and use. This manual provides detailed instructions for setup, operation, and troubleshooting to ensure optimal performance of your device.

2. Package Contents
Please check the package for the following items:
- TKSTAR TK818-4G GPS Tracker
- User Manual (this document)
- SIM Card Adapters (if included)

3. Product Overview
3.1 Hardware Description
The TK818-4G GPS Tracker is designed to be compact and functional, integrating into a standard car cigarette lighter port. It features multiple ports and indicator lights for easy operation.

- Type-C port
- SOS Key
- Type-A port (USB)
- SIM card slot
- Indicator light
3.2 Indicator Light Status
The device uses indicator lights to communicate its status:
| Indicator Light Status | Meaning |
|---|---|
| Yellow light - Solid | GPRS connection |
| Yellow light - Flash | No GPRS signal |
| Blue light - Solid | GPS connection |
| Blue light - Flash | No GPS signal |
| Red light - Solid | GPS working |
| Red light - Off | GPS sleep/power off |

4. Setup Instructions
4.1 SIM Card Installation
The device requires a Nano SIM card for network connectivity. Ensure the SIM card is registered and has sufficient credit for calls and data.
- Before installing or removing the SIM card, ensure the device is powered off (unplugged from the cigarette lighter).
- Insert the Nano SIM card into the SIM card slot (position 4 in the hardware description).
- Connect the device to the vehicle's cigarette lighter port. The red indicator light should illuminate after installation.
- Once the device is working normally, apply the dustproof sticker over the SIM card holder.
Note: GPS functionality works best outdoors with a clear view of the sky.

4.2 APN Settings for Online Tracking
For online tracking via the APP and platform, the APN (Access Point Name) must be correctly configured. If the SIM card is correctly inserted and the device is online on the APP, you may not need to send these commands.
To find the correct APN content, you can check with your SIM card carrier or insert the SIM card into a mobile phone to find the APN settings.
Command Instructions to Set APN:
| Instruction | Command Format | Reply |
|---|---|---|
| Set APN (any existing will be replaced) | apn123456 [apn content] | apn ok |
| Set APN username | apnuser123456 [content] | apnuser ok |
| Set APN password | apnpasswd123456 [content] | apnpasswd ok |
Example for SpeedTalk SIM card (US):
APN: Mobilenet
APN username: (none)
APN password: (none)
To set APN for SpeedTalk, send the following SMS commands to the SpeedTalk SIM card number in the tracker:
- Send SMS:
apn123456 mobilenet - Once you receive
apn ok, remove and re-insert the SIM card from the device to reboot it.
5. Operating Instructions
5.1 SMS Tracking
You can track the device's location by sending SMS commands to its SIM card number.
To receive a Google Maps link of the tracker's location:
- Send the message
G123456#to the SIM Card number in the GPS tracker. - Alternatively, call the SIM Card number in the GPS tracker.
- You will receive a text message with a Google Maps link. Click the link to view the exact location.
Explanation of SMS Reply Parameters:
- lat:XX.XXXXX lon:YY.YYYYY: Latitude and longitude values for positioning.
- Spd:ZZZ: Device moving speed in km/h.
- T:DD/MM/YY HH:MM: Real-time tracking time (default is London time; can be set in the APP).
- bat:PPP%: Battery percentage (alarms if below 20%).
- ID:XXXXXXXXXX: Device ID number for APP and platform login.
- Google maps link: Link to Google Maps showing the tracker's position.
- lac:AAAA BBBB: Real-time LBS (Location Based Service) positioning data (used when no GPS signal).
5.2 Admin Number Setting
After setting an admin number, all SMS operations to the device will only be accepted from this number.
- Command:
admin123456 [phone number](Use your own mobile phone number, not the tracker's SIM number). - Reply:
admin ok - Example:
admin123456 13265790180
To cancel the admin number:
- Command:
noadmin123456 - Reply:
noadmin ok
5.3 Alarm Settings
The device supports various alarms that can be configured via SMS or the APP.
Over-speed Alarm Setting: (Works only in Sleep by shock sensor mode)
- Command:
speed123456 [speed value](e.g.,speed123456 070for 70km/h). - Reply:
speed ok - To cancel, set speed value to
0.
Shake Alarm Setting:
- Keep the tracker stationary for 5 minutes for this function to work.
- Command:
shock123456 - Reply:
shock ok - The tracker will send an SMS "sensor alarm!" to the admin number when shocked.
To cancel the shake alarm:
- Command:
noshock123456 - Reply:
noshock ok
SOS Function Setting:
- Command:
sos123456 [phone number](Your mobile number). - Reply:
sos number ok - After setting, press the SOS button (position 2) for 3 seconds. The device will send "help alarm!" SMS to the SOS number.
To cancel the SOS number:
- Command:
nosos123456 - Reply:
nosos number ok

5.4 Terminal Time Setting
To set the local time zone for SMS positioning:
- Command:
timezone123456 [local time zone](e.g.,timezone123456 +1,timezone123456 -1,timezone123456 0). - Reply:
time ok!
5.5 Reset Hardware
To restore all settings to factory state (except APN settings):
- Command:
begin123456 - Reply:
begin ok
5.6 Website Tracking
Platform: www.mytkstar.net
- Select "Login by ID" on the bottom of the screen.
- Enter the ID No. (found on the back side of the device cover).
- Enter the default Password:
123456.
5.7 Application Tracking (Android/iOS)
Search for "WINNES GPS" in the Apple App Store or Google Play Store, or scan the QR code below to install the application on your mobile phone.

Login by ID (for a single tracker):
- Select "Login by ID" on the bottom of the screen.
- Server: www.mytkstar.net
- Enter the ID No. (from the back of the device cover).
- Enter the default Password:
123456.
Login by Username (for multiple trackers):
If you have multiple tracking devices, you can click "Sign Up" in the app to register an account. Device ID numbers can then be added to your account.
- Select "Login by username" on the bottom of the screen.
- Server: www.mytkstar.net
- Enter your registered username (email) and password.
5.8 Real-time Tracking and App Features
The app allows real-time tracking of the device and can also track your smartphone's position.

App Icons and Functions:
- Map Zoom: Click "+" and "-" to zoom in and out.
- View Different Location: Icon to switch between smartphone and device locations.
- Map Vision: Icon to change map view between 2D/3D.
- Historical Route: View route history for up to six months by selecting start and end times.
- Geo-fence: Set up a virtual boundary. An alarm is triggered if the device exits this area.
- Issue: Send commands to the device.
- Device Info: Displays device information.
- Alert Message: Shows alert messages generated by the device.
- Account Info: Displays account information.
- Notifications: Turn on/off different alarm types.

Settings within the "Issue" Icon:
- Set Admin number: Configure the phone number to control the device via SMS and receive alarms. (Cancel by deleting the number and clicking "OK").
- Set SOS number: Configure the number to receive SOS alarm messages. (Cancel by deleting the number and clicking "OK").
- Low Battery Alarm Switch: Enable/disable low battery alarm messages.
- Set Overspeed Alarm: Input a speed value to set the alarm. (Cancel by entering "0" and clicking "OK").
- Vibration alarm switch: Enable/disable vibration alarms. An alarm is issued if vibration occurs after 5 minutes of continuous stationary in sleep mode.
- LED: Turn on/off the LED indicator light.
- Set Language and Timezone: Configure language and time zone for SMS tracking messages.
- GPS work mode setting: Select the upload frequency of device positioning data (factory default is 60 seconds).
- Vibration Motor: Enable/disable the vibration motor.
6. Troubleshooting (FAQ)
If you encounter any issues with your TK818-4G GPS Tracker, please refer to the following common problems and solutions:
- Fail to turn it on:
- Check if the battery is charged.
- No SIM signal:
- Check if the SIM card is installed correctly.
- Verify that the SIM card supports the GSM network.
- Ensure the SIM Card's PIN code is deactivated.
- Confirm that call forwarding is not active.
- No GPS signal:
- Ensure the device has an open view of the sky for normal GPS signal reception.
- No reply to SMS command:
- Check if the command format is correct or if the SIM card has insufficient balance.
- Ensure the SIM card has sufficient balance, supports making calls, sending messages, GPRS network, and has opened call shows and turned off call transfer.
- SMS position OK, but cannot use the APP and web platform:
- Check if the APN is correctly set. Refer to section 4.2 for APN settings.
- Platform position is different from the actual position:
- If there is no uploading position time or GPS signal, call the device's phone number to receive the position message.
- If the message shows LBS tracking data (like Pic 2 in the manual), it means there is no GPS signal, and the position is the last known GPS location.
- If the message shows GPS tracking data (like Pic 1 in the manual), it means the device has not yet reached the next uploading time.
Notice: Do not attempt to assemble or disassemble the device without authorization.
7. Specifications
| Feature | Description |
|---|---|
| Model Name | TK818-4G |
| Brand Name | tkstar |
| Item Size | 85mm*49mm*26mm (3.35"*1.93"*1.02") |
| Net Weight | 41g |
| LTE/4G Bands | LTE-FDD: B1/B2/B3/B4/B5/B7/B8/B12/B13/B18/B19/B20/B25/B26/B28/B66 LTE-TDD: B34/B38/B39/B40/B41 |
| Network | GSM/GPRS/EDGE |
| GPS Accuracy | 5m |
| Input Voltage | DC 9V-32V |
| Output (USB-A) | DC 5V/2A; 9V/2A |
| Output (Type-C) | DC 5V/2A; 9V/2A |
| Battery Life | 30 Hours & Up (Internal battery for backup) |
| GPS Module | Yes |
| Special Features | Remote Control |
| Certification | CE, FCC, RoHS |
8. User Tips
- For best GPS accuracy, ensure the device is installed in a location with a clear view of the sky, away from metal obstructions.
- Regularly check the SIM card balance to ensure continuous tracking and alarm functionality.
- Utilize the geofence feature to define safe zones and receive alerts if your vehicle enters or exits these areas.
- Keep the admin number updated to ensure you receive all critical alerts and can control the device via SMS.
- When setting up the APN, double-check the information with your SIM card provider to avoid connectivity issues.
9. Battery Information
Your TK818-4G GPS Tracker is operated by a rechargeable lithium polymer battery, primarily for backup power when the device is unplugged from the car charger.
- The internal battery of the Winnes GPS device cannot be replaced or removed by the user.
- Do not disassemble, throw batteries into fire, or short-circuit them.
- Do not burn or pierce the GPS tracker. Protect it from mechanical damage.
- Never expose the device to excessive heat (e.g., direct sunshine, fire) as this increases the risk of battery leakage.
- Only use the USB cable provided with your Winnes GPS device. Using other cables may overcharge the battery, leading to fire or explosion.
Disregarding these instructions can cause damage to the device and may lead to the battery exploding.
10. Disposal Information
Batteries are considered hazardous waste. For proper disposal, use appropriate containers provided at commercial battery recycling points or local council waste disposal facilities. When disposing of your GPS device, follow local regulations. Information can be obtained from your local council waste disposal facility.
Dispose of packaging materials according to type: cardboard in paper recycling, plastics in plastic recycling.
11. Declaration of Conformity
CE RED Directive 2014/53/EU:
Juneo hereby declares that the Winnes/TKMARS GPS Tracker (item no. TK818) conforms to the fundamental requirements and other relevant provisions of directive 2014/53/EU.
The full text of the declaration of conformity can be viewed on our website: www.mytkstar.net/en/doc.html
12. Support
For further detailed instructions and information, please refer to the official user manual PDF available at: TKSTAR TK818-4G User Manual (PDF).
For technical assistance, please visit the official TKSTAR website or contact their customer support.





