1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your MOUNTAINONE Wired Video Doorbell System. Please read this manual thoroughly before installation and use to ensure proper functionality and safety. Keep this manual for future reference.
2. Product Overview
The MOUNTAINONE Wired Video Doorbell System is designed to enhance home security and convenience, allowing you to see, hear, and speak to visitors at your door. The system includes an indoor monitor and an outdoor doorbell unit.

Figure 2.1: The complete MOUNTAINONE Wired Video Doorbell System, showing the 7-inch indoor LCD monitor and the outdoor doorbell unit with keypad.
2.1 Key Features
- 7-inch Ultra-thin Indoor Monitor: Features a sensitive touch screen for clear viewing and easy interaction.
- Durable Outdoor Camera: Constructed from durable ABS material, designed to be rain-resistant and oxidation-resistant. Includes IR-CUT for clear images.
- Two-Way Intercommunication: Allows clear audio communication between the indoor monitor and the outdoor unit.
- Remote Unlock Function: Conveniently unlock your door directly from the indoor monitor.
- Infrared LED Night Vision: Provides clear visibility even in low-light conditions or at night.
- Adjustable Ringtones and Volume: Choose from 25 types of door ringtones with adjustable volume, chrominance, and brightness.
- Wide Application: Suitable for villas, apartments, homes, hotels, offices, and public buildings.
2.2 Package Contents
Verify that all items listed below are included in your package:

Figure 2.2: Included components in the product package. Ensure all parts are present before installation.
- Outdoor Doorbell Unit (x1)
- 7-inch Indoor Monitor (x1)
- Power Adapter (x1)
- Mounting Bracket for Indoor Monitor (x1)
- Mounting Screws and Wall Plugs (x1 set)
- Remote Control (x1)
- RFID Key Fobs (x5)
- Connection Cables (x1 set)
- User Manual (x1)
3. Specifications
| Feature | Specification |
|---|---|
| Indoor Monitor Screen Size | 7 inches |
| Connectivity Technology | Wired |
| Outdoor Unit Material | Metal Plastic (ABS) |
| Viewing Angle | 92 degrees |
| Power Consumption | 10 Watts |
| Video Recording Resolution | 720p |
| Special Features | Motion Detector, Night Vision |
| Mounting Type | Wall Mount |
| Recommended Use | Indoor Security |
| Model Number | 816MJK |

Figure 3.1: Technical dimensions and component labels for the indoor monitor and outdoor unit.
4. Installation Guide
This section provides step-by-step instructions for installing your video doorbell system. Professional installation is recommended for electrical wiring. Ensure power is disconnected before beginning installation.
4.1 Safety Precautions
- Always disconnect power at the circuit breaker before installing or servicing any electrical components.
- Ensure all wiring complies with local electrical codes.
- Do not expose the indoor monitor to moisture or extreme temperatures.
- The outdoor unit is designed to be rain-resistant, but avoid direct high-pressure water jets.
4.2 Wiring Diagram
Refer to the following diagram for proper wiring connections between the indoor monitor, outdoor unit, and electronic lock (if applicable).

Figure 4.1: System wiring diagram for connecting the indoor monitor, outdoor unit, and an optional electronic lock.
Key Connections:
- Connect the 15V power adapter to the indoor unit.
- Connect the outdoor unit to the indoor unit using the provided multi-core cable.
- For electronic lock integration, connect the "LOCK+" and "GND" terminals from the indoor unit to your electronic lock.
- An optional "PUSH" button (exit switch) can be connected to the "PUSH" and "GND" terminals for internal door release.
4.3 Mounting the Units
- Outdoor Unit:
- Choose a suitable location near your door, typically at eye level (approx. 1.5 meters / 5 feet from the ground).
- Ensure the location provides a clear view of visitors and is protected from direct, heavy rainfall.
- Use the mounting bracket as a template to mark drilling points on the wall.
- Drill holes, insert wall plugs, and secure the bracket with screws.
- Connect the wiring to the outdoor unit before mounting it onto the bracket.
- Secure the outdoor unit to the bracket.

Figure 4.2: Outdoor unit mounted on a wall, demonstrating its weather resistance.
- Indoor Monitor:
- Select a convenient indoor location, such as a hallway or living room, where the monitor is easily accessible.
- Mount the indoor monitor bracket to the wall using screws and wall plugs.
- Connect all necessary cables (power, outdoor unit, lock control) to the back of the indoor monitor.
- Carefully attach the indoor monitor to its wall bracket.
5. Operation
This section details how to use the various functions of your MOUNTAINONE Video Doorbell System.
5.1 Basic Functions
- Answering a Call: When a visitor presses the call button on the outdoor unit, the indoor monitor will ring. Press the Answer button on the monitor to establish two-way communication.
- Monitoring: To view the outdoor area without a visitor pressing the doorbell, press the Monitor button on the indoor unit.
- Unlocking the Door: During a call or while monitoring, press the Unlock button on the indoor monitor to remotely open the connected electronic lock.
- Intercommunication: If you have multiple indoor monitors, you can use the Intercom button to communicate between different indoor units.
5.2 Adjusting Settings
The indoor monitor allows you to customize several settings:
- Ringtone Selection: Access the menu to choose from 25 different ringtones.
- Volume Adjustment: Adjust the ringtone volume and communication volume using the dedicated buttons or menu options.
- Display Settings: Adjust the brightness and chrominance (color saturation) of the monitor display for optimal viewing.

Figure 5.1: The indoor monitor features adjustable volume and a selection of 25 ringtones.
5.3 Using RFID Key Fobs and Remote Control
The outdoor unit supports unlocking via RFID key fobs and a remote control for convenient access.
- RFID Key Fobs: Present an authorized RFID key fob to the card reader area on the outdoor unit to unlock the door.
- Remote Control: Use the provided remote control to unlock the door from a short distance. Ensure the remote control is paired with the system according to the pairing instructions in the full user manual (if applicable).
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your video doorbell system.
- Cleaning:
- Wipe the indoor monitor screen and outdoor unit lens with a soft, dry, lint-free cloth.
- For stubborn smudges, slightly dampen the cloth with water. Do not use abrasive cleaners, solvents, or chemical sprays.
- Outdoor Unit Care:
- Periodically check the outdoor unit for any debris or obstructions around the camera lens, microphone, or speaker.
- Ensure the weather-resistant cover is intact and free from damage.
- Wiring Inspection:
- Occasionally inspect visible wiring for any signs of wear, damage, or loose connections.
7. Troubleshooting
If you encounter issues with your video doorbell system, refer to the following common problems and their solutions.
| Problem | Solution |
|---|---|
| No image on indoor monitor. |
|
| No sound or poor audio quality. |
|
| Door does not unlock. |
|
| Outdoor unit not responding. |
|
8. Warranty and Support
MOUNTAINONE products are manufactured with high-quality standards. For warranty information and technical support, please refer to the warranty card included in your package or contact your retailer.
For further assistance, you may visit the official MOUNTAINONE website or contact their customer service department. Please have your model number (816MJK) and purchase details ready when seeking support.
