1. Introduction
The KERUI M7 Split Welcome Alarm system utilizes advanced wireless transceiver technology, a robust microcomputer control system, and power-saving design. It integrates high-quality voice processing technology with 32 selectable songs. This system offers stable and reliable performance, with receivers and transmitters paired via wireless code. It combines the functions of a welcome chime, burglar alarm, doorbell, and night light, making it suitable for various environments such as homes, offices, stores, and factories.
2. Features
- 32 selectable songs/ringtones.
- Integrated functions: Welcome chime, burglar alarm, doorbell, and night light.
- Supports up to 30 accessories (detectors and remote controls).
- Compatible with accessories using EV1527/PT2262 code.
- 4 adjustable volume levels (High/Middle/Low/Mute) from 0-80dB.
- Power-saving design.
- Long reliable range: Up to 150m/490ft (open air) between sensors and receiver.
- PIR motion sensor detection range: Approximately 2-8m/6-26ft.
- Visual alerts: LED light flashes upon detection.
3. Setup
3.1 Component Overview
3.2 Battery Installation
- Receiver: Open the battery compartment on the back of the receiver. Insert three 1.5V AAA batteries (not included) or connect a DC 5V power supply.
- PIR Motion Sensor: Open the battery compartment. Insert two 1.5V AAA batteries (not included).
Note: The red LED light near the USB port on the receiver is the power indicator. It lights up and stays red when the battery is charging, or it lights off otherwise. Please use high-quality alkaline or rechargeable batteries.
3.3 Mounting
The receiver can be placed on a flat surface using its stand or mounted on a wall using the hanging hole on its back. The PIR motion sensor can be installed at the side/top of a door or in other strategic locations to detect movement. Mounting hardware and adhesive tape are included for convenience.
4. Operating Instructions
4.1 Controls
- Turning On/Off: Long press the [♫] button for 5 seconds.
- Song Selection: After booting, press the [♫] button to cycle through 32 music options.
- Volume Adjustment: Press the [III] button to adjust the volume level. There are 4 levels to choose from.
4.2 Mode Selection
The receiver has 4 mode types: Welcome Mode, Alarm Mode, Doorbell Mode, and Night Light Mode. You can switch between modes by pressing the [M] button after booting, or by using a paired remote control (if applicable).
| Mode | Playing/Function |
|---|---|
| Welcome Mode | "Hello welcome" voice prompt. |
| Alarm Mode | Alert sound like "Wu-wu-wu". |
| Doorbell Mode | Plays one of the 32 songs. |
| Night Light Mode | LED lights up for 1 second upon trigger. |
4.3 Pairing Detectors and Remote Controls
- Add Detectors: After booting, press the [♫] and [III] buttons simultaneously. The LED light will illuminate, indicating it has entered the adding detectors status. Trigger a detector to send a signal to the receiver. The receiver's LED light will twinkle once, confirming the detector has been added. You can add up to 30 detectors. If the LED twinkles three times, the maximum number of detectors has been reached. Press the [III] button to exit, or it will automatically exit after 20 seconds of inactivity.
- Delete Detectors: After booting, press the [♫] and [I] buttons simultaneously. The LED light will illuminate. Long press the [I] button until the LED goes off. All detectors will be deleted, and the system will exit the status automatically.
- Add Remote Controls: After booting, press the [M] and [♫] buttons simultaneously. The LED light will illuminate, indicating it has entered the adding status. Press any button on the remote control to send a signal to the receiver. The receiver's LED light will twinkle once, confirming the remote control has been added. You can add multiple remote controls. If the LED twinkles three times, the maximum number of remote controls has been reached. Press the [M] button to exit, or it will automatically exit after 20 seconds of inactivity.
- Delete Remote Controls: After booting, press the [M] and [III] buttons simultaneously. The LED light will illuminate. Long press the [I] button until the LED goes off. All remote controls will be deleted, and the system will exit the status automatically.
4.4 Night Light Function
There are two ways to use the night light function:
- Long press the [M] button for 3 seconds. The LED will light up for 2 minutes.
- Set the receiver mode to "Night Light Mode". Triggering a detector will cause the LED to light up for 2 seconds.
You can press any key to turn off the light.
4.5 Reset
To reset the device: Unplug the power and remove the battery. Press and hold the [III] button to turn on without power. Release the button when the LED flashes 10 times. This will remove all paired detectors and remote controls, and the mode will revert to Welcome Mode.
5. Maintenance
- Ensure to use high-quality alkaline or rechargeable batteries for optimal performance and longevity.
- Do not attempt to repair the device if you are not a professional. Unauthorized repairs may void the warranty and cause damage.
- Avoid installing the product in locations exposed to direct rain or sunlight to prevent damage and ensure proper operation.
- Keep the device clean and free from dust. Use a soft, dry cloth for cleaning.
6. Troubleshooting
- Device not turning on: Check battery installation and ensure batteries are charged or replaced. If using DC power, verify the power supply is connected correctly.
- No sound/light upon detection:
- Ensure the device is powered on.
- Check if the volume is set to an audible level (not Mute).
- Verify that the detector is properly paired with the receiver (refer to 'Add Detectors' section).
- Ensure the PIR sensor is placed within its detection range (2-8m) and line of sight to the area being monitored.
- Check the battery in the PIR sensor.
- False alarms: Adjust the placement of the PIR sensor to avoid areas with direct sunlight, heat sources, or moving objects (e.g., curtains near a window) that might trigger it.
- Reduced wireless range: Ensure there are no major obstructions (thick walls, metal objects) between the detector and the receiver. Large electronic devices can also cause interference.
7. Specifications
| Parameter | Value |
|---|---|
| Model Number | M7 |
| Brand Name | KERUI |
| Working Current | <1mA |
| Working Temperature | -10 °C to 50 °C |
| Receiving Frequency | 433MHz |
| Receiving Distance | 150 meters (open area) |
| Receiver Dimensions (approx.) | 117mm (H) x 48mm (W) x 27mm (D) |
| PIR Sensor Dimensions (approx.) | 77mm (L) x 39mm (W) x 48mm (H) |
| Package Weight (approx.) | 0.192 kg |
8. Warranty & Support
For detailed warranty information and support, please refer to the official product documentation. A user manual in PDF format is available for download and can be accessed via the seller's product page or by contacting customer support.
Reference: User manual (PDF)
9. User Tips
- This system is versatile and can be used as a welcome doorbell chime during the day and switched to a burglar alarm system at night.
- Consider using multiple receivers or detectors for larger areas like hotels or multi-story homes to ensure comprehensive coverage.
- The system is designed for indoor use. Avoid outdoor installation as it lacks waterproof functionality.
- The M7 system supports a maximum of 30 detectors, allowing for extensive coverage and customization.
10. Frequently Asked Questions (FAQ)
- Q: What is the intended use of this item?
- A: The KERUI M7 can be applied for door, wireless, doorbell, and window security/alert functions.
- Q: What tasks can this item perform?
- A: It is usable for door, wireless, doorbell, and window monitoring, providing welcome, burglar, doorbell, and night light functionalities.
