Product Overview
The SECRUI Wireless Doorbell system provides a convenient and reliable solution for home and office notification. Featuring a waterproof push button and two plug-in receivers, it offers over 1000ft wireless coverage, 52 chimes, and 5 adjustable volume levels up to 110dB. The system is designed for easy, wire-free installation and includes an LED flash indicator for enhanced accessibility.

Image: The complete SECRUI Wireless Doorbell system, including the push button and two plug-in receivers.
What's Included
- 1 × Transmitter (push button with battery included)
- 2 × Plug-in receivers
- 1 × Adhesive tape
- 2 × Screws
- 2 × Anchors
- 1 × User manual
Safety Information
- Always follow the manufacturer's advice when using power tools and wear suitable protective equipment (e.g., safety goggles) when drilling holes.
- Before drilling holes in walls, check for hidden electricity cables and water pipes. The use of a cable/pipe locator is advisable if in doubt.
Setup and Installation
The SECRUI Wireless Doorbell is designed for hassle-free installation without the need for complex wiring.
Transmitter (Push Button) Installation
- Remove the battery insulation tab from the transmitter.
- Choose your desired mounting location for the push button, ensuring it is within range of the receivers.
- Adhesive Mounting: Clean the surface thoroughly. Peel off one side of the double-sided adhesive tape and attach it to the back of the transmitter. Peel off the other side and firmly press the transmitter onto the wall for at least 30 seconds.
- Screw Mounting: Use the provided screws and anchors to securely mount the transmitter to the wall.

Image: Visual guide for installing the push button using either adhesive tape or screws.
Receiver Setup
- Plug each receiver into a standard electrical outlet in your desired locations within your home. The receivers will light up to indicate they are powered on.
- Ensure receivers are placed where the chime can be heard clearly throughout your home, especially in large houses or multi-level dwellings.

Image: A plug-in receiver shown inserted into a wall outlet, ready for use.
Pairing and Testing
The doorbell system comes pre-paired. If re-pairing is needed or to add new accessories:
- Long press and hold the volume button on the receiver for 5 seconds until the LED indicator flashes, indicating pairing mode.
- Immediately press the push button on the transmitter. The receiver will beep twice and the LED will flash, confirming successful pairing.
- Test the system by pressing the push button. Both receivers should chime and flash.
Video: A demonstration of installing the doorbell in seconds without wiring.
Operating Instructions
Changing Chimes
Each receiver features 52 selectable chimes. To change the chime:
- Press the music selection button (note icon) on the side of the receiver to cycle through the available melodies.
- Once you find your preferred chime, it will be automatically saved. The receiver remembers your last melody even after being unplugged.
Adjusting Volume
The receivers offer 5 levels of adjustable volume (0 dB to 110 dB).
- Press the volume control button (speaker icon) on the side of the receiver to adjust the volume level.
- Continue pressing until you reach your desired loudness. The receiver remembers your last volume setting.
Mute Mode and LED Flash
The doorbell includes a mute mode and a colorful LED flash for visual notification.
- The lowest volume setting is mute mode, which silences the chime while still activating the LED flash. This is ideal for quiet times or for individuals with hearing impairments.
- The LED flash provides a visual alert when the doorbell is pressed, complementing the audible chime.

Image: Detailed view of the receiver's control buttons for music selection and volume adjustment, along with the LED indicator.
Key Features
- Extended Coverage: Over 1000ft wireless range in open spaces, suitable for large homes, apartments, offices, and classrooms.
- Easy Installation: No wiring required; simply plug in receivers and mount the push button with adhesive tape or screws.
- Customizable Chimes: 52 distinct melodies and 5 adjustable volume levels (0 dB to 110 dB), including mute mode.
- Visual Alert: Colorful LED flash provides a visual notification, beneficial for the elderly or hearing impaired.
- Memory Function: Remembers your last selected melody and volume level after power loss.
- Expandable System: Supports adding more SECRUI receivers or push buttons for increased coverage and customized notification zones.
- Weatherproof Transmitter: The push button is designed to withstand various weather conditions.

Image: The doorbell's extensive 1000ft wireless range is depicted, showing its suitability for large properties.
Maintenance
- Battery Replacement: The transmitter uses a CR2032 battery. When the LED indicator on the push button no longer lights up or the range decreases significantly, it's time to replace the battery. Carefully open the transmitter casing to access and replace the battery.
- Cleaning: Wipe the doorbell components with a soft, dry cloth. Avoid using harsh chemicals or abrasive cleaners.
- Optimal Performance: Ensure receivers are not obstructed by large metal objects or thick walls, which can reduce wireless range.
Troubleshooting
- No Sound from Receiver: Check if the receiver is properly plugged into a live outlet. Ensure the volume is not set to mute (0 dB). Re-pair the transmitter and receiver if necessary.
- Short Wireless Range: Relocate receivers closer to the transmitter. Avoid placing receivers near large metal objects, thick walls, or other electronic devices that may cause interference. Replace the transmitter battery if it's low.
- Transmitter Not Working: Check if the battery insulation tab has been removed. Replace the CR2032 battery. Ensure the push button is not damaged.
- Interference: If the doorbell triggers unexpectedly, it might be due to interference. Try changing the chime melody to a different frequency.
Product Specifications
| Feature | Specification |
|---|---|
| Manufacturer | SECRUI |
| Model Number | M508+F55 |
| Item Weight | 6.4 ounces |
| Product Dimensions | 1.57 x 1.18 x 2.36 inches |
| Power Source | AC & Battery-Powered |
| Voltage | 120 Volts |
| Installation Method | Self-Adhesive & Screw-In |
| Temperature Range | -4-140 Degrees Fahrenheit |
| Sound Level | 110 Decibels (Adjustable) |
| Type of Bulb | LED |
| Special Features | Adjustable Volume, Optional Ringtone, Memory Function |
| Transmitter Battery | 1 CR2032 battery (included) |
| Average Battery Life | 3 years |
Warranty and Support
SECRUI products are designed for reliability and performance. For warranty information, technical support, or any inquiries regarding your doorbell system, please refer to the contact details provided in the packaging or visit the official SECRUI website. Keep your purchase receipt for warranty claims.