1. Introduction
The KERUI D2 Wireless Door/Window Alarm System is a versatile security device designed to protect your home, garage, or office. This system functions as an alarm host, capable of detecting unauthorized entry through doors and windows. It can also be integrated with additional wireless sensors such as PIR motion detectors, smoke detectors, and emergency buttons, providing a comprehensive security solution. The alarm emits a loud 120dB sound upon activation to deter intruders.
2. Package Contents
Please check the package for the following items:
- 1 x KERUI D2 Main Alarm Unit (Host)
- 1 x Magnetic Strip for Door/Window Sensor
- 1 x Remote Control
- 2 x AAA 1.5V Batteries
- Double-sided Adhesive Pads
- User Manual (this document)
3. Specifications
| Feature | Specification |
|---|---|
| Model Number | D2 (KR-D2) |
| Brand Name | KERUI |
| Alarm Type | The Alarm |
| Kit Configuration | Door Sensor |
| Dimensions (Main Unit) | 96 x 43 x 11 mm |
| Communication Interface | Wireless |
| Arming Type | FR Remote-controller |
| Max Remote Controls Supported | 20 |
| Max Detectors Supported | 40 |
| Output Number | 1 |
| Power Source | 2 x AAA 1.5V Batteries |
| Working Voltage | 3V |
| Standby Current | <10mA |
| Working Current | >70mA |
| Certification | CE |
| Alarm Sound Level | 120dB |
| PIR Sensor Detection Range (compatible) | 8-12 meters / 110 degrees |
| Wireless Distance (open area, compatible) | 300 meters |
| Wireless Transmitting Frequency (compatible) | 433 MHZ (+ 75 KHZ) |
| Shell Material | ABS plastics |
4. Setup
4.1 Battery Installation
- Gently slide open the back cover of the main alarm unit.
- Insert two (2) AAA 1.5V batteries, ensuring correct polarity (+/-).
- Close the battery compartment cover securely.
4.2 Mounting the Door/Window Sensor
- Identify a clean, dry, and stable surface on your door/window frame (for the main unit) and the door/window itself (for the magnetic strip). Avoid unstable or easily broken surfaces.
- Remove the protective film from the double-sided adhesive pads.
- Attach one adhesive pad to the back of the main alarm unit and the other to the back of the magnetic strip.
- Carefully align the main alarm unit and the magnetic strip. They should be mounted parallel to each other, with the alignment marks facing each other, and be no more than 1 cm apart when the door/window is closed.
- Press firmly for a few seconds to ensure secure adhesion.
- Locate the power switch on the side of the main unit and slide it to the 'ON' position to activate the sensor.
4.3 Pairing Remote Controls and Additional Detectors
The KERUI D2 system supports up to 20 remote controls and 40 additional detectors (PIR sensors, smoke detectors, etc.).
- Ensure the main alarm unit is powered on.
- Press the 'Setting button' on the side of the main alarm unit. The indicator light will typically flash or change color, indicating it's in pairing mode.
- While the main unit is in pairing mode, activate the remote control (e.g., press an arm/disarm button) or trigger the additional detector (e.g., wave hand in front of PIR sensor).
- The main unit will emit a confirmation sound or the indicator light will change again to confirm successful pairing.
- Repeat for all additional remote controls and detectors.
5. Operating Instructions
5.1 Arming the System
To arm the system, press the 'Arm' button (often represented by a closed padlock or similar icon) on your remote control. The main unit's indicator light may flash or change color to confirm the system is armed.
5.2 Disarming the System
To disarm the system, press the 'Disarm' button (often represented by an open padlock or similar icon) on your remote control. The main unit's indicator light will confirm the system is disarmed.
5.3 Alarm Trigger
When the system is armed, an alarm will be triggered if:
- The magnetic strip separates from the main door/window sensor unit (e.g., a door or window is opened).
- A paired PIR motion detector senses movement.
- Any other paired detector (e.g., smoke detector, emergency button) is activated.
Upon trigger, the main unit will emit a loud 120dB alarm sound and its LED lights will flash for 1 second.
6. Maintenance
6.1 Battery Replacement
The main alarm unit is powered by two AAA 1.5V batteries. When the batteries are low, the unit will emit a 'du du du...' sound as a reminder. To replace the batteries:
- Slide open the back cover of the main alarm unit.
- Remove the old batteries.
- Insert two new AAA 1.5V batteries, observing correct polarity.
- Close the battery compartment cover.
6.2 Cleaning
To clean the device, gently wipe the exterior with a soft, dry cloth. Do not use liquid cleaners or abrasive materials, as these may damage the unit.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Alarm does not sound when door/window opens. | 1. System is not armed. 2. Batteries are low or depleted. 3. Magnetic sensor parts are not properly aligned or too far apart. | 1. Arm the system using the remote control. 2. Replace the AAA batteries. 3. Ensure the main unit and magnetic strip are aligned and within 1 cm when the door/window is closed. |
| False alarms. | 1. Magnetic sensor parts are loose or misaligned. 2. Unstable mounting surface. 3. (If using PIR) Environmental factors like drafts or pets. | 1. Re-secure and re-align the magnetic sensor parts. 2. Mount the device on a stable surface. 3. Adjust PIR sensor placement or sensitivity if applicable. |
| Remote control not working. | 1. Remote control battery is depleted. 2. Remote control is not paired with the main unit. | 1. Replace the remote control battery (typically a button cell). 2. Re-pair the remote control following the pairing instructions in Section 4.3. |
| Low battery reminder sounds frequently. | Batteries are nearing end of life. | Replace the AAA batteries in the main unit. |
8. User Tips
- Optimal Placement: For best performance, ensure the main alarm unit and its magnetic strip are mounted securely and remain within 1 cm of each other when the protected entry point is closed.
- Regular Testing: Periodically test your alarm system by arming it and then opening the protected door or window to ensure it functions correctly.
- Battery Life: While the device offers long standby time, it's good practice to have spare AAA batteries on hand for quick replacement when the low battery alert sounds.
- Expandability: Take advantage of the system's expandability by adding PIR motion sensors for larger areas or smoke detectors for enhanced safety.
9. Warranty and Support
For any product-related inquiries, technical support, or warranty claims, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.
