1. Introduction
The Tiiwee A3 Outdoor Siren is an essential accessory designed to enhance your Tiiwee alarm system. It integrates seamlessly with existing Tiiwee A1 or X1 sirens, sensors, and remote controls, providing an external, highly visible, and audible deterrent. This siren can be combined with other Tiiwee components to create a customized security setup tailored to your specific needs.

Image: The Tiiwee A3 Outdoor Siren, its user manual, mounting screws, and four AA batteries, illustrating the complete package contents.
2. Key Features
- Powerful Alert System: Equipped with a 120 dB siren for maximum audible deterrence.
- Visual Deterrent: Features a bright red flashing light that activates during an alarm.
- Adjustable Volume: Offers 3 distinct volume settings to suit different environments.
- Silent Mode: An option where only the red light flashes, providing a discreet visual alert without sound.
- Weatherproof Design: The A3 is waterproof, making it suitable for reliable outdoor use in various weather conditions.
- Tamper Protection: Includes a dedicated tamper switch on the back to prevent unauthorized removal or sabotage.

Image: The Tiiwee A3 Outdoor Siren in both its standby (white) and active (red flashing light) states.
3. Compatibility
The Tiiwee A3 Outdoor Siren is designed for seamless integration with all Tiiwee alarm systems that utilize the A1 or X1 siren as their central unit. It functions as an extension, connecting wirelessly to your existing Tiiwee sensors (such as door/window contacts and motion detectors) and remote controls. This allows for a comprehensive and expandable home security solution.

Image: The A3 Outdoor Siren shown with compatible Tiiwee sensors and remote controls.

Image: A diagram showing how the A3 Outdoor Siren connects to Tiiwee sensors and remote controls, and its role within the Tiiwee alarm ecosystem.
4. Setup and Installation
4.1 Package Contents
- Tiiwee A3 Outdoor Siren Unit
- 4 x AA 1.5V Alkaline Batteries
- Mounting Screws and Wall Plugs
- User Manual (this document)
4.2 Power Supply
The A3 Outdoor Siren can be powered in two ways:
- Battery Power: Insert the 4 included AA 1.5V alkaline batteries into the battery compartment. Ensure correct polarity.
- 220V Power Adapter: For continuous power, the siren can be connected to a 220V power adapter (sold separately by Tiiwee) via the USB power adapter connection port.
4.3 Mounting the Siren
Choose a suitable outdoor location for the siren, ensuring it is visible and audible, and within wireless range of your Tiiwee alarm system. Consider mounting it in a location that deters tampering. The siren is equipped with a tamper switch on the back; if the unit is forcibly removed from its mounting plate, it will trigger an alarm.
- Open the battery compartment cover on the back of the siren.
- Identify the mounting plate and the screw holes.
- Secure the mounting plate to your chosen surface using the provided screws and wall plugs.
- Attach the siren unit to the mounted plate, ensuring the tamper switch is correctly engaged. Use the two small screws to fix the A3 securely to the plate.

Image: Internal components of the A3 Siren, highlighting the battery compartment, set button, and power connection.

Image: Examples of the A3 Outdoor Siren installed on different home exteriors.
5. Operating Instructions
5.1 Pairing with Tiiwee System Components
To integrate the A3 Outdoor Siren into your existing Tiiwee alarm system, it must be paired with your Tiiwee A1 or X1 siren, as well as any sensors and remote controls you wish to trigger it. Refer to your main Tiiwee alarm system manual for detailed pairing instructions. Generally, this involves putting the A3 into a pairing mode (often by pressing a 'Set' button inside the unit) and then activating the sensor or remote control you wish to pair.
5.2 Volume Settings
The A3 siren offers 3 volume settings. These settings are typically adjusted via a switch or button located inside the unit or through the main alarm system's settings. Consult your main Tiiwee alarm system manual for specific instructions on how to change the volume level of the A3 siren.
5.3 Silent Mode
In silent mode, the A3 siren will only activate its red flashing light without emitting any sound. This mode is useful for visual alerts in situations where an audible alarm is not desired. The activation of silent mode is usually controlled through the main Tiiwee alarm system settings or a specific button on the A3 unit itself.
6. Maintenance
6.1 Battery Replacement
When the batteries are low, the siren may indicate this with a specific light pattern or through your main Tiiwee alarm system. To replace the batteries:
- Carefully remove the siren unit from its mounting plate.
- Open the battery compartment cover.
- Remove the old AA batteries and dispose of them responsibly.
- Insert 4 new AA 1.5V alkaline batteries, ensuring correct polarity.
- Close the battery compartment cover and reattach the siren to its mounting plate.
6.2 Cleaning
To maintain optimal performance and appearance, clean the exterior of the siren periodically with a soft, damp cloth. Do not use abrasive cleaners or solvents, as these can damage the unit. Ensure no moisture enters the internal components.
7. Troubleshooting
- Siren not activating: Check battery levels or 220V power connection. Ensure the siren is correctly paired with the triggering sensor/remote and the main alarm system. Verify the tamper switch is fully engaged.
- Siren too quiet/loud: Adjust the volume settings as described in the operating instructions or your main alarm system manual.
- Red light not flashing: Ensure the siren is not in silent mode if an audible alarm is expected. Check power supply.
- False alarms: Review the placement of the siren and associated sensors. Ensure the tamper switch is not loose. Check for environmental factors that might trigger sensors.
- Difficulty pairing: Ensure the siren and the component you are trying to pair are within range. Follow the pairing instructions precisely as outlined in your main Tiiwee alarm system manual.
8. Specifications

Image: Dimensions of the Tiiwee A3 Outdoor Siren.
| Attribute | Detail |
|---|---|
| Model Number | TWA3AU01 |
| Manufacturer Part Number | TWOS01 |
| Brand | tiiwee |
| Product Type | Siren |
| Color | Red |
| Product Dimensions (L x W x H) | 19L x 8W x 6.5H cm |
| Power Source | Battery powered (4 x AA 1.5V, included) or 220V adapter (sold separately) |
| Battery Description | Alkaline |
| Voltage | 220 Volt (for adapter) |
| Control Method | Remote |
| Acoustic Level | 120 Decibel |
| Mounting Type | Wall/Surface Mounting |
| Maximum Wireless Range | 100 Meters |
| Compatible Devices | Tiiwee alarm systems based on A1 and X1 |
| Included Components | Screws |
| Country of Origin | China |
9. Warranty Information
Specific warranty details for the Tiiwee A3 Outdoor Siren are typically provided with your purchase documentation or can be found on the official Tiiwee website. Please retain your proof of purchase for any warranty claims. The warranty generally covers manufacturing defects under normal use conditions.
10. Support
For technical assistance, troubleshooting beyond this manual, or inquiries regarding your Tiiwee A3 Outdoor Siren, please visit the official Tiiwee support page or contact their customer service directly. Contact information can usually be found on the Tiiwee website or in your product packaging.