1. Introduction
The PGST PG103 4G Alarm System is a comprehensive smart home security solution designed to protect your home, office, garage, or shop. This system integrates Wi-Fi and 4G GSM connectivity, allowing for remote control and monitoring via the Tuya Smart Life app. It supports a wide range of wireless sensors and offers voice control compatibility with Amazon Alexa and Google Assistant. With its user-friendly interface and robust features, the PG103 provides reliable security and peace of mind.
2. Package Contents
The contents of your PGST PG103 alarm system package may vary depending on the specific kit purchased. A typical kit includes:
- 1 x PGST PG103 Alarm Host (Control Panel)
- 1 x Power Adapter (EU Plug, US Plug, or UK Plug depending on selection)
- Wireless PIR Motion Sensor(s) (Pet Immune 15kg)
- Wireless Door/Window Sensor(s)
- Remote Controller(s)
- RFID Tag(s)
- Siren (wired or wireless)
- Other optional accessories such as IP cameras, smoke detectors, gas detectors, etc.

3. Specifications
| Attribute | Value |
|---|---|
| Model Number | PG103-4G-TUYA |
| Brand Name | PGST |
| Size | 185*125*14.7mm |
| Communication Interface | Wireless |
| Arming Type | APP |
| Video Interface | No (Supports IP Cameras as accessories) |
| Display | Yes |
| Password Keyboard | Yes |
| Smart home platform | Tuya |
| Certification | CE |
| Alarm Type | The Alarm, SMS, GPRS, Apps Control |
| Network | 4G |
| Wireless frequency | 433Mhz |
| Coding way | EV1527 |
| Backup battery | 3.7V/500mAh Lithium battery |
| Feature | 4G Alarm System |
| Voice Control | Support Alexa / Google Assistant |
| Connection Type | Wireless |
| Input voltage | DC 5V |
| Zone Number | 99 wireless zones |
| Output Number | 5 alarm phones & APP & SMS |
| Burglar alarm support | PIR motion sensor, door sensor |
| Fire alarm support | Smoke detector, Gas detector |
4. Setup Guide
4.1 Physical Installation of the Alarm Host
The PG103 alarm host offers flexible installation options:
- Wall Installation: Mount the host securely to a wall using the provided hardware. Ensure it is within Wi-Fi range and has good 4G signal if applicable.
- Desktop Installation: Use the integrated stand to place the host on a flat surface, such as a table or shelf.

4.2 SIM Card Insertion (for 4G models)
If you have a 4G model, insert a compatible 4G SIM card into the designated slot on the alarm host. Ensure the SIM card is activated and has sufficient credit/data for SMS and GPRS communication.
4.3 App Installation and Connection
- Download the 'Tuya Smart' or 'Smart Life' app from your smartphone's app store (iOS or Android).
- Register or log in to your account.
- Add the PG103 alarm host by following the in-app instructions. This typically involves putting the host into pairing mode and connecting it to your Wi-Fi network.
4.4 Sensor Pairing
The system supports up to 99 wireless zones and up to 100 sensors. To pair sensors:
- Access the sensor pairing menu on the alarm host or via the app.
- Activate each sensor (e.g., open a door sensor, trigger a PIR motion sensor) to send a signal to the host.
- Confirm successful pairing on the host's display or in the app. Assign a name and zone type to each sensor for easy identification.

5. Operation
5.1 Arming and Disarming
You can arm or disarm the system using several methods:
- Control Panel: Enter your password on the host's keypad and select the desired arming mode (e.g., Away, Home).
- Remote Controller: Press the arm or disarm button on your remote.
- Mobile App: Use the Tuya Smart Life app to remotely arm or disarm the system from anywhere.
- RFID Tag: Tap an authorized RFID tag on the host's RFID reader to quickly arm or disarm.
5.2 Defense Zones
The system features 8 types of defense zones to customize your security:
- Smart Defense Zone: Standard zone for general security.
- Ordinary Zone: Basic detection zone.
- Doorbell Mode: Triggers a doorbell sound when activated.
- Receiving Mode: For specific receiving functions.
- Emergency Zone: Immediate alarm trigger for critical situations.
- SOS: Dedicated for SOS seniors asking for help.
- Stay Defense Zone: Active when you are home (e.g., perimeter sensors).
- Close the Defense Zone: Temporarily disable a specific zone.

5.3 Voice Control
The PG103 system supports voice commands via Amazon Alexa and Google Assistant. Link your Tuya Smart Life account to your voice assistant app to enable commands like "Alexa, arm my home" or "Hey Google, disarm the alarm."

5.4 SOS Function
In case of an emergency, pressing the SOS button on the control panel or a dedicated SOS pendant will immediately trigger an alarm and send notifications to pre-set emergency contacts via phone call, SMS, and app alerts. This feature is particularly useful for elderly individuals or those needing immediate assistance.
5.5 Remote Monitoring and Control
The mobile app allows you to receive alarm information, arm/disarm the system, and even communicate through the alarm host (two-way audio, if supported by the host and accessories). When you leave home, simply set the 'Away' defense mode, and all monitored situations will be under your control.
6. Maintenance
6.1 Battery Replacement
Sensors and remote controllers are powered by batteries. When a sensor's battery is low, the alarm host or app may display a low battery warning. Replace batteries promptly to ensure continuous protection. The main alarm host has a built-in 3.7V/500mAh Lithium backup battery to provide power during outages.
6.2 Cleaning
Wipe the alarm host and sensors with a soft, dry cloth. Do not use liquid cleaners or abrasive materials.
7. Troubleshooting
- No Alarm Trigger: Check if the system is armed and if the sensor is properly paired and within range. Ensure sensor batteries are not depleted.
- App Connectivity Issues: Verify your Wi-Fi connection and 4G signal strength. Restart the alarm host and your router if necessary. Ensure the Tuya Smart Life app is updated to the latest version.
- False Alarms: Check sensor placement to avoid interference from pets (for non-pet-immune PIRs), drafts, or direct sunlight. Adjust sensitivity settings if available.
- Low Battery Warnings: Replace sensor batteries immediately upon receiving a low battery notification from the app or host.
8. User Tips
- Battery Monitoring: The app or host will warn you when sensor batteries are running low. Pay attention to these alerts and replace batteries promptly to maintain continuous security.
- Camera SD Card: If using an IP camera accessory, consult its specific manual for the maximum supported SD card size.
- System Expansion: The PG103 system is designed to be expandable. While the main host acts as the central control, it is not designed to connect to multiple external display screens. All primary control and monitoring are done via the host's integrated display and the mobile app.
9. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the seller's specific policies or contact PGST customer service. Keep your purchase receipt as proof of purchase.
10. Safety Information
- Do not attempt to disassemble or repair the device yourself. Refer all servicing to qualified personnel.
- Keep the device away from water, moisture, and extreme temperatures.
- Use only the provided power adapter.
- Ensure proper ventilation for the alarm host.
- Keep out of reach of children.