1. Introduction
The Diosmio Fireproof Safe is designed to provide robust security for your valuables, important documents, and personal items. Constructed from solid alloy steel, it offers fireproof and waterproof protection, along with advanced digital combination lock features. This manual provides detailed instructions for setup, operation, and maintenance to ensure optimal performance and security.
2. Safety Information
WARNING:
- Do not store the emergency keys inside the safe. Keep them in a secure, separate location.
- Ensure the safe is securely mounted to prevent unauthorized removal.
- Keep the keypad dry and clean to ensure proper function.
- Do not expose the safe to extreme temperatures or direct water submersion beyond its rated capabilities.
3. Package Contents
- Diosmio Fireproof Safe Unit
- Emergency Keys (x2)
- User Manual
- Mounting Bolts (x4)
- Fireproof Bag (x1)
- Cushion Cloth (x1)

Figure 3.1: Included components of the Diosmio Fireproof Safe.
4. Setup
4.1. Installing Batteries
The safe's electronic keypad requires four (4) AA batteries (not included). The battery compartment is located on the inside of the safe door, behind a small removable cover.
- Open the safe door using the emergency key (if it's the first time opening).
- Locate the battery compartment cover on the inside of the door.
- Slide the cover to open the compartment.
- Insert four (4) AA batteries, ensuring correct polarity (+/-).
- Replace the battery compartment cover.
Video 4.1: Demonstration of external battery box function and battery installation.
This video shows how to access the external battery compartment and install the required AA batteries for the safe's electronic keypad. It highlights the convenience of external battery access to prevent lockout due to dead internal batteries.
4.2. Mounting the Safe
For enhanced security, the Diosmio safe can be securely mounted to a floor or wall. Pre-drilled holes are provided on the back and bottom of the safe for easy installation.
- Choose a suitable location for mounting, ensuring a solid surface.
- Position the safe and mark the drilling points through the pre-drilled holes.
- Drill holes into the wall or floor using an appropriate drill bit.
- Align the safe with the drilled holes and secure it using the provided mounting bolts.

Figure 4.2: The safe features pre-drilled holes for secure mounting to a wall or floor.
5. Operating the Safe
5.1. Opening with Emergency Key
The safe can be opened using the emergency key, which is useful for initial access or if the digital combination is forgotten or batteries are dead.
- Locate the hidden keyhole cover on the keypad panel.
- Gently push the cover to reveal the keyhole.
- Insert the emergency key and turn it clockwise while simultaneously turning the knob on the keypad.
- Pull the door open.

Figure 5.1: The safe offers dual unlock methods: digital combination and emergency key.
5.2. Setting/Changing Passcode
You can set a personal digital combination (3-8 digits) for quick and secure access.
- With the safe door open, locate the red reset button on the inside of the door (usually near the hinge).
- Press the red reset button. The yellow indicator light on the keypad will illuminate.
- Enter your desired 3-8 digit passcode on the keypad.
- Press the '#' key to confirm. The safe will emit two beeps, and the green light will flash, indicating the new code is set.
Video 5.2: Detailed demonstration of setting and changing the digital combination, as well as opening the safe with the key.
This video illustrates the process of programming a new passcode for the safe's electronic lock. It also shows how to use the emergency key to open the safe, which is crucial for initial setup or in case of forgotten codes or dead batteries.
5.3. Opening with Passcode
- Enter your programmed 3-8 digit passcode on the keypad.
- Press the '#' key to confirm. The green indicator light will illuminate.
- Within 5 seconds, turn the knob clockwise to open the safe door.
5.4. Alarm System
The safe is equipped with an alarm system for enhanced security. If an incorrect passcode is entered three consecutive times, the alarm will be triggered.

Figure 5.3: The safe's sensitive alarm system activates after three incorrect code entries or violent tapping.
Video 5.4: Demonstration of the alarm system being triggered by incorrect passcode entries.
This video illustrates the process of programming a new passcode for the safe's electronic lock. It also shows the safe's alarm functionality, which activates if the wrong code is entered multiple times. This feature provides an additional layer of security against unauthorized access.
6. Features Overview
6.1. Anti-theft & Fireproof Construction
The Diosmio safe is constructed from solid steel with a tamper-proof lid, providing robust anti-theft protection. It is designed to be fireproof, offering protection for your valuables in case of fire. The included fireproof bag provides an additional layer of protection for sensitive documents.
6.2. Removable Shelf
The safe features a removable shelf, allowing for flexible storage configurations to accommodate items of various sizes, from small jewelry to larger documents or firearms.

Figure 6.1: The removable shelf allows for flexible storage arrangements within the safe.
6.3. Smart Sensor Light
Upon opening the safe door, an internal smart sensor light will automatically turn on, illuminating the contents for easy visibility.

Figure 6.2: The smart sensor light provides convenient illumination inside the safe.
7. Maintenance
- Cleaning: Wipe the exterior with a soft, damp cloth. Avoid abrasive cleaners.
- Battery Replacement: Replace batteries annually or when the low battery warning (red flashing light) appears.
- Key Storage: Always keep emergency keys in a secure location outside the safe.
8. Troubleshooting
- Safe will not open with passcode:
- Ensure batteries are not depleted. Replace if necessary.
- Verify the correct passcode is being entered.
- Try opening with the emergency key.
- Alarm is sounding:
- Enter the correct passcode to disarm the alarm.
- If the alarm was triggered by tampering, inspect the safe for any signs of forced entry.
- Forgotten Passcode:
- Use the emergency key to open the safe.
- Follow the instructions in Section 5.2 to set a new passcode.
9. Specifications
| Feature | Detail |
|---|---|
| Brand | Diosmio |
| Product Dimensions | 12.2"D x 15"W x 19.68"H |
| Lock Type | Electronic, Key |
| Color | Metallic |
| Capacity | 2.5 Cubic Feet |
| Material | Alloy Steel |
| Special Features | Alarm System, Removable Shelf, Fireproof |
| Mounting Type | Floor Mount |
| Control Type | Push Button Control |
| Item Weight | 33 Pounds |
| Water Resistance Level | Waterproof |
10. Warranty & Support
Diosmio offers 24-hour online customer service to assist you with any questions or issues. In case of lost keys, please contact customer service, and a replacement key will be resent to you.
For further assistance, please visit the Diosmio Store on Amazon.


