1. Product Overview
The KERUI Standalone Security Alarm System is a wireless, easy-to-install security solution designed for homes, offices, and shops. This kit provides a loud siren horn, remote controls, and various sensors to alert you to potential intrusions. It operates independently without the need for Wi-Fi, GSM, or a dedicated application, making it a straightforward and effective security measure.
The system is expandable, supporting additional wireless detectors and remote keyfobs to customize coverage for your specific needs.

Figure 1: Complete KERUI Standalone Security Alarm System Kit including siren, PIR motion sensors, door/window contact sensors, and remote controls.
2. Components
- Siren Horn (Main Unit): The central alarm unit, producing a loud sound up to 115dB. Powered by AC 110V~220V adapter.
- Remote Controls: Used to arm, disarm, and trigger the SOS function. The kit includes two remote controls.
- PIR Motion Detectors: Passive Infrared sensors that detect movement. The kit includes two PIR motion detectors.
- Door/Window Contact Sensors: Two-part sensors that trigger an alarm when a door or window is opened. The kit includes three door/window sensors.
- Power Adapter: For powering the siren horn.

Figure 2: Detailed view of the KERUI Siren Horn, showing its waterproof cover, antenna, adjusting screw, screw hole, and power connection.

Figure 3: KERUI PIR Motion Detector, powered by a 9V 6F22V battery (included). It detects movement up to 19-26 feet away with a 60-degree vertical and 110-degree horizontal angle.

Figure 4: KERUI Door/Window Contact Sensor, powered by a 23A 12V battery (included). Features a low voltage indicator light.
3. Specifications
| Feature | Specification |
|---|---|
| Brand | KERUI |
| Model Number | KERUI-H01 |
| Power Source | Battery Powered (Sensors), AC 110V~220V (Siren) |
| Wireless Frequency | 433MHz |
| Noise Level | Up to 115 dB |
| Maximum Range (Open Area) | 328 feet (100 meters) |
| Control Method | Remote Control |
| PIR Sensor Detection Range | 19-26 feet |
| PIR Sensor Vertical Angle | 60 degrees |
| PIR Sensor Horizontal Angle | 110 degrees |
| Operating Temperature | -15°C to 55°C |
| Relative Humidity | 40% - 70% |
| Siren Alarm Duration | Approx. 2 minutes (then resets to armed state) |
| Dimensions | 3.94 x 3.15 x 3.15 inches (Siren) |
| Item Weight | 1.7 pounds |
4. Setup and Programming
The system comes fully programmed. However, if you wish to add new sensors or remote controls, or if you experience false alarms, you may need to re-program or factory reset the system. Follow the steps below carefully.
4.1 Adding Remote Controls
- Plug in and out the power supply to the siren horn 3 times.
- The siren will emit a
