1. Introducción
The TKSTAR TK905 is a 4G GPS Tracker designed for real-time location monitoring of vehicles and assets. It operates on both 4G LTE and 2G GSM/GPRS networks, providing reliable tracking capabilities worldwide. Equipped with a built-in GPS module and communication module, it can pinpoint locations using GPS satellites and LBS (Location Based Service). Users can remotely monitor the device via SMS, a dedicated mobile application, or a web plataforma de seguimiento
A key feature of the TK905 is its built-in 5000mAh Li-ion battery, offering extended standby and working times. Its strong magnetic base allows for easy and secure installation on various metal surfaces without the need for complex wiring. The device also includes multiple alarm functions and different working modes to optimize performance and battery life.

Figure 1: TKSTAR TK905 4G GPS Tracker with mobile app interface and magnetic feature.
Nota importante sobre compatibilidad de red:
The TK905 is available in 2G and 4G versions. The 4G TK905 supports both 4G and 2G networks, while the 2G TK905 is compatible only with 2G networks. In countries where 2G networks have been phased out (e.g., USA, Australia, New Zealand, Korea, Japan, Canada, Singapore, China Taiwan), it is essential to use the 4G version or a 3G compatible version if available. For other countries, either version may be suitable depending on local network availability.

Figure 2: Network compatibility information for 2G and 4G TK905 models.
2. Especificaciones
| Característica | Especificación |
|---|---|
| Dimensiones | 90mm x x 72mm 22mm (3.5 "x 2.8" x 0.8 ") |
| Peso | 168 gramos |
| Red | 4G LTE Cat-M1/NB2 & 2G GSM/GPRS |
| 2G GSM Frequency | 850/900/1800/1900 MHz |
| 4G LTE Frequency | B1/B2/B3/B4/B5/B8/B12/B13/B18/B19/B20/B26/B28/B66 |
| Conjunto de chips GPS | MTK high sensitivity chip / u-blox UBX-G7020 |
| Sensibilidad GPS | -159dBm/-165dBm |
| Exactitud del GPS | 5-10 m |
| Formas de posicionamiento | GPS + LBS |
| Batería | Batería de iones de litio 3.7V 5000mAh recargable |
| Tiempo de trabajo | Around 7-10 days |
| Tiempo de espera | Up to 60 days (TK905) / 90 days (TK905B) |
| Entrada de carga | 5 V CC, 1.0 A |
| Vol de funcionamientotage | 4.5V-5.5V DC |
| Temperatura de funcionamiento | -20℃ a +70℃ |
| Clasificación de impermeabilidad | IP65 (Splash resistant, do not submerge) |
| Características especiales | Built-in 5 powerful magnets, Voice Monitor, Lifetime Free Tracking Platform |
| Proceso de dar un título | CE, RoHS |

Figure 3: TKSTAR TK905 GPS Tracker dimensions.
3. Contenido del paquete
Al abrir el paquete, debería encontrar los siguientes elementos:
- 1 x TKSTAR TK905 GPS Tracker Device
- 1 x cable de carga USB
- 1 x Manual de usuario
- 1 x bolsa de almacenamiento
- 1 x Set of SIM Card Adapters (Normal, Micro, Nano)
Video 1: Unboxing the TKSTAR GPS Tracker, showing the device, manual, USB cable, and SIM adapters.

Figure 4: Package contents of the TKSTAR TK905 GPS Tracker.
4. Guía de configuración
4.1. Instalación de la tarjeta SIM
- Open the rubber cover on the side of the device to access the SIM card slot.
- Insert a compatible SIM card (chip facing up) into the slot. The device will automatically power on.
- Ensure the indicator light turns on, signifying successful SIM card insertion.
Important SIM Card Requirements:
- The SIM card must have caller ID display function enabled.
- Internet data traffic must be enabled.
- The PIN code must be unlocked.
- The SIM card must have sufficient balance.
- The call transfer function must be turned off.

Figure 5: SIM card slot and USB port on the TK905.
4.2. Encender el dispositivo
The device automatically starts when the SIM card is correctly inserted. The indicator light will confirm its status.
4.3. APN Configuration for Online Tracking
To enable online tracking via the web platform or mobile app, you need to configure the APN (Access Point Name) settings. The APN information is specific to your SIM card carrier. You can find this information by checking your SIM card carrier's website or by inserting the SIM card into a mobile phone to find its APN settings.
Follow these steps to set the APN:
- Activate GPRS: Enviar el comando SMS
gprs123456al número de la tarjeta SIM del rastreador. - Establecer APN: Send the following SMS commands, replacing 'content' with your carrier's APN details. Note that there should be a small blank space after '123456' in each command.
apn123456 content(p.ej,apn123456 web.vodafone.de)apnuser123456 content(if your APN requires a username, e.g.,apnuser123456 vodafone. If not needed, you can omit this command or leave 'content' blank.)apnpasswd123456 content(if your APN requires a password, e.g.,apnpasswd123456 vodafone. If not needed, you can omit this command or leave 'content' blank.)
5. Operación
5.1. Seguimiento de SMS
You can track the device's location by calling the SIM card phone number in the tracker or by sending an SMS command.
- Call Tracking: Call the SIM card number in the tracker. The device will reply with a Google Maps link showing its current position.
- SMS Command Tracking: Enviar el comando SMS
G123456#to the tracker's SIM card number. The device will reply with a Google Maps link and additional information.

Figure 6: SMS reply example for GPS tracking.

Figure 7: SMS reply examples showing GPS and LBS tracking information.
5.2. Admin Number Setting
After setting an admin number, all SMS operations to the device will only be accepted from this number. This enhances security and control.
- Set Admin Number: Enviar
admin123456 [your mobile phone number]to the tracker. The tracker will reply withadmin ok. - Cancel Admin Number: Enviar
noadmin123456to the tracker. The tracker will reply withnoadmin ok.

Figure 8: SMS command example for setting an admin number.
5.3. Over-speed Alarm
This alarm functions only in continuous positioning mode. When the device's speed exceeds a preset limit, it will send an alert to the admin number.
- Set Over-speed Alarm: Enviar
speed123456 [speed limit](p.ej,speed123456 070for 70 km/h). The tracker will reply withspeed ok. - Cancel Over-speed Alarm: Enviar
nospeed123456to the tracker. The tracker will reply withnospeed ok. - If the speed limit is exceeded, the tracker will send "speed alarm!" to the admin number every 5 minutes.

Figure 9: SMS command example for setting an overspeed alarm.

Figure 10: Overspeed Alarm illustration.
5.4. Shake Alarm
This function triggers an alarm if the device detects vibration after being stationary for a period.
- Set Shake Alarm: Enviar
shock123456to the tracker. The tracker will reply withshock ok. - Cancel Shake Alarm: Enviar
noshock123456to the tracker. The tracker will reply withnoshock ok. - Nota: The tracker must remain stationary for 5 minutes for this function to activate. Once activated, if the unit is shocked, it will send an SMS "sensor alarm!" to the admin number.

Figure 11: SMS command example for setting a shake alarm.

Figure 12: Vibration Alarm illustration.
5.5. Device Working Mode Setting
The device offers different working modes to manage power consumption.
- Modo de suspensión por tiempo:
Dominio:sleep123456 time. Responder:sleep time ok.
In this mode, the tracker works for 5 minutes after being woken up, then returns to sleep. GPS is shut off, and GSM operates in low consumption mode. SMS commands or incoming calls can wake up the tracker. - Sleep by Shock Sensor Mode (Factory Setting):
Dominio:sleep123456 shock. Responder:sleep shock ok.
If no shock is detected for 5 minutes, the tracker enters "sleep by shock" mode. GPS is shut off, and GSM operates in low consumption mode. Vibration, SMS commands, or incoming calls can wake up the tracker.

Figure 13: SMS command example for setting sleep by shock mode.
5.6. Terminal (Local) Time Setting
You can adjust the device's time zone.
- Dominio:
timezone123456 [local time zone]. Responder:time ok.
Exampellos:timezone123456 +1,timezone123456 -1,timezone123456 0.

Figure 14: SMS command example for setting the time zone.
5.7. Restablecer hardware
To perform a hardware reset on the device:
- Dominio:
begin123456. Responder:begin ok.

Figure 15: SMS command example for resetting hardware.
5.8. Online Tracking (Web Platform & Mobile App)
The TK905 offers lifetime free access to its web tracking platform and mobile application.
- Web Plataforma de seguimiento:
Websitio: www.mytkstar.net
Select "Log in by IMEI" on the bottom of the screen. Enter the IMEI number (found on the back of the device) and the default password123456. - Seguimiento de aplicaciones móviles:
Buscar "TKSTAR GPS" in the Apple App Store or Google Play Store, or scan the QR code provided in the manual to install the application. Log in using the device's IMEI/ID and the default password123456.

Figure 16: TKSTAR web tracking platform login page.

Figure 17: TKSTAR mobile application login screen.
5.9. Monitoreo de voz
The device supports remote voice monitoring.
- Enviar el comando SMS
Monitor123456to the tracker. The device will reply withMonitor Okand enter monitoring mode. - Once in monitoring mode, call the SIM card number in the device. It will automatically answer, allowing you to listen to the surrounding audio.

Figure 18: Voice monitoring feature in a car interior.
5.10. Geo-cerca
Set up a virtual safety zone to receive alerts when the device enters or exits a defined area.
- Configure geo-fence settings via the web tracking platform or mobile application.
- The unit will send alarm information to the app and web server when it crosses the defined boundary.

Figure 19: Geo-fence diagram with city background.
5.11. Reproducción de ruta histórica
Review past travel routes of the device.
- El web server saves up to six months of history data, which can be downloaded in XLS format.
- The mobile application allows you to query historical routes for up to 180 days.

Figure 20: Historical Route Playback interface.
5.12. Alarma de batería baja
The tracker will send an alarm notification to the admin number when the battery voltagy cae por debajo de 3.5 V.

Figure 21: Battery life and low battery alert information.
6. Mantenimiento
6.1. Carga de la batería
The TK905 is equipped with a 3.7V 5000mAh rechargeable Li-ion battery. Use the provided USB charging cable and a DC 5V 1.0A power adapter (not included) to charge the device. A full charge typically provides 7-10 days of working time or up to 60 days of standby time, depending on the configured working mode.
6.2. Impermeabilización
The device has an IP65 waterproof rating, meaning it is protected against dust ingress and low-pressure water jets from any direction. It can resist splashes but should not be submerged in water. Ensure the rubber cover for the SIM card slot and USB port is securely closed to maintain its water resistance.

Figure 22: IP65 Dust and Waterproof feature illustration.
7. Solución de problemas
| Problema | Instrucciones / Soluciones |
|---|---|
| El dispositivo no se enciende | Compruebe si la batería está cargada. |
| No GSM/WCDMA signal |
|
| No hay señal GPS | Move the device to an area with a clear, open view of the sky to receive GPS signals normally. |
| Sin respuesta al comando SMS | Check if the SMS command password is correct and the format is accurate. |
| No reply to calling / No alarm message | Verify that the authorized / admin number is correctly set up. |
| Entered wrong admin number, need to reset | You can reset the GPS tracker device by logging into your account on the web plataforma. |
| Device appears inactive in app despite charge | The device might be in a sleep mode. Try calling the SIM card number or sending an SMS command to wake it up. |
8. Consejos para el usuario
- Gestión de la tarjeta SIM: Always ensure your SIM card has an active plan with data and SMS capabilities, and sufficient balance, especially if relying on SMS commands for tracking.
- Optimizar la vida útil de la batería: Utilize the 'Sleep by Time' or 'Sleep by Shock Sensor' modes to significantly extend battery life, especially when the device is not in constant motion.
- Montaje seguro: While the device has strong magnets, for critical applications or in environments with significant vibration, consider using additional securing methods to prevent accidental detachment.
- Free Tracking: The online tracking platform (www.mytkstar.net) and mobile application are free to use for life.
- Configuración APN: If you encounter issues with online tracking, double-check your APN settings with your SIM card provider. Incorrect APN is a common cause of connectivity problems.
9. Garantía y soporte
9.1. Garantía
The TKSTAR TK905 GPS Tracker comes with a one-year warranty from the date of purchase. This warranty covers manufacturing defects and malfunctions under normal use. Please retain your proof of purchase for warranty claims.
9.2. Soporte técnico
For any technical issues, questions regarding setup, or assistance with the tracking platform/app, please contact the seller or manufacturer's customer support. Refer to the contact information provided at the point of purchase or on the official TKSTAR websitio.