1. Introduction
The KERUI DW9 Wireless Driveway Security Alarm is a versatile system designed to enhance security and provide convenience for various environments, including driveways, garages, stores, offices, and factories. It features a waterproof PIR motion detector that communicates wirelessly with an alarm host, offering both burglar alarm and welcome modes. This manual provides detailed instructions for setting up, operating, and maintaining your DW9 system.
2. Key Features
- Extended Transmission Distance: The receiver can detect sensors up to 1150 feet in open areas, and up to 500 feet in real-world settings with obstructions like trees, buildings, and walls.
- Reduced False Alarms: Features an adjustable detection distance (6 to 12 meters) and interchangeable motion sensor covers to change the detective view angle (from 110° to 10°), minimizing triggers from small animals or falling leaves. Super infrared penetrating power helps reduce false alarms from bad weather (rain/snow) or natural light interference (sunshine).
- Customizable System: Each defense zone on the alarm host can be configured with a unique LED light flash, allowing for easy identification of the triggered zone.
- Easy Installation: No wiring required. The system is pre-paired out of the box, allowing for quick setup by simply inserting batteries and placing the components.
- Long Battery Life: The alarm host can be powered by a DC 5V adapter or 3 AAA batteries. Each outdoor sensor operates on 2 AA batteries, providing up to half a year of use or 35,000 triggers.
- Dual Operating Modes: Supports both a burglar alarm mode and a welcome mode.
- Waterproof Detector: The PIR motion detector is waterproof (IPV4) for reliable outdoor use.
- Adjustable Volume & Tones: The host offers 5 levels of volume adjustment (up to 70dB) and 16 selectable ringtones.
3. Package Contents
Please check the package to ensure all items are present:
- KERUI DW9 Alarm Host
- PIR Motion Detector(s) (quantity varies by kit)
- DC 5V Power Adapter (for host)
- Mounting Bracket(s) for PIR Detector
- Screws and Wall Plugs
- Interchangeable Detection Hole Covers (for PIR detector)
- User Manual

4. Setup and Installation
4.1 Powering the Devices
- Alarm Host: The host can be powered by the included DC 5V power adapter (via micro USB port) or by 3 AAA batteries (not included). To insert batteries, open the battery compartment on the back of the host.
- PIR Motion Detector: Each detector requires 2 AA batteries (not included). Open the battery compartment on the back of the detector to insert them.


4.2 Mounting the PIR Motion Detector
The PIR motion detector is waterproof (IPV4) and suitable for outdoor use. It comes with a mounting bracket for easy installation.
- Attach the mounting bracket to the back of the PIR detector.
- Secure the bracket to a desired surface (e.g., wall, fence post) using the provided screws.
- Recommended Installation Height:
- For vehicle detection: 1-2 meters from the ground.
- For human detection: 2-4 meters from the ground.

4.3 Adjusting Detection Angle and Distance
The PIR motion detector has a 90-degree detection angle. To reduce false alarms from small animals or specific areas, you can adjust the detection angle and distance using the included interchangeable detection hole covers.
- The system comes with two motion sensor covers.
- By changing these covers, you can adjust the detective view angle from 110° to 10°.
- The detection distance can be adjusted from 6 to 12 meters.

5. Operation
5.1 Alarm Host Controls
The alarm host features several buttons on its side for control:
- Turn On/Off: Power button.
- Volume Adjustment: Adjusts the sound level (5 levels, from mute to 70dB).
- Select Tones: Cycles through 16 optional ringtones.
- Setting: Used for pairing and mode selection.

5.2 Operating Modes
- Alarm Mode: When the motion detector is triggered, the host will sound a 110dB alarm and flash its LED indicator. This mode is ideal for security applications in garages, driveways, or other areas requiring intrusion alerts.
- Welcome Mode: When the motion detector is triggered, the host will play a