1. Introduction
Thank you for choosing the VOCOO LCD Digital Thermometer Hygrometer. This device is designed to provide accurate and real-time monitoring of indoor temperature and humidity, along with a digital clock display. Its compact design and multiple mounting options make it suitable for various environments, ensuring a comfortable and healthy living space.

2. Key Features
- 3-Level Air Comfort Indicator: Displays DRY, COMFORT, or WET conditions based on humidity levels.
- Clear LCD Display: Large 3.34-inch screen for easy readability from various angles.
- High Accuracy & Fast Refresh: Updates readings every 10 seconds with high precision.
- Multiple Mounting Options: Includes tabletop stand, magnetic back, and adherency wall mount.
- Battery Powered: Operates on a single CR2032 button battery with long battery life.
- Digital Clock: Displays time and date with 12h/24h format options.

3. Package Contents
Please check the package for the following items:
- 1 x VOCOO LCD Digital Thermometer Hygrometer
- 1 x CR2032 Button Battery (pre-installed or separate)
- 1 x User Manual
- 1 x Metal Adhesive Pad
4. Specifications
| Feature | Specification |
|---|---|
| Theory | Thermometer Hygrometer |
| Display Type | DIGITAL LCD |
| Power Type | Button Battery (CR2032) |
| Battery Life | 8-12 months (approx.) |
| Temperature Range | -9.9 ℃ ~ 60 ℃ (14.2˚F ~ 140˚F) |
| Humidity Range | 10% ~ 99% RH |
| Temperature Accuracy | ± 1 ℃ |
| Humidity Accuracy | ± 3% RH |
| Update Rate | Every 10 seconds |
| Display Size | 3.34 inches / 8.5 cm |
| Product Dimensions | 70 x 70 x 15 mm |
| Product Weight | 65g |
| Smart Device | No |
5. Setup
5.1. Battery Installation
- Locate the battery compartment on the back of the device.
- If a battery is not pre-installed, insert one CR2032 button battery, ensuring the correct polarity (+/-).
- Close the battery compartment securely.
5.2. Initial Power-On
The device will automatically power on once the battery is installed. The display will show current temperature, humidity, time, and date.
6. Operating Instructions

6.1. Button Functions
The device features three buttons on the back:
- SET Button: Used to enter and confirm time/date settings.
- '-' Button: Used to switch between 12-hour and 24-hour time formats.
- '+' Button: Used to switch between Celsius (°C) and Fahrenheit (°F) temperature units.
6.2. Setting Time and Date
- Long press the 'SET' button to enter time setting mode. The hour digit will start flashing.
- Use the '+' or '-' buttons to adjust the hour.
- Press 'SET' again to confirm the hour and move to setting the minute.
- Repeat steps 2 and 3 for minutes, then for the date (month and day).
- After setting the date, press 'SET' one last time to exit the setting mode.
6.3. Switching Temperature Units
Press the '+' button to toggle between Celsius (°C) and Fahrenheit (°F) display.
6.4. Switching Time Format
Press the '-' button to toggle between 12-hour and 24-hour time formats.
6.5. Understanding the Comfort Indicator
The device displays a 3-level air comfort indicator (DRY, COMFORT, WET) to quickly assess indoor conditions:
- DRY: Humidity below 30% RH.
- COMFORT: Humidity between 30% and 69% RH.
- WET: Humidity 70% RH or above.
An arrow on the display will point to the current comfort level. If humidity is consistently within the 30-69% range, the arrow will remain in the comfort zone.
7. Mounting Options
Your thermometer hygrometer offers versatile mounting options:
- Tabletop Stand: Extend the retractable stand on the back of the device to place it on any flat surface, such as a desk, shelf, or counter.
- Magnetic Back: The device has a built-in strong magnet, allowing it to be securely attached to metallic surfaces like refrigerators.
- Adherency Wall Mount: Use the provided metal adhesive pad. Peel off the protective film from one side of the adhesive pad and stick it to a clean, dry wall surface. Then, attach the device to the metal pad using its magnetic back.

8. Maintenance
8.1. Cleaning
Wipe the device with a soft, dry cloth. Do not use abrasive cleaners or immerse the device in water.
8.2. Battery Replacement
When the display becomes dim or unresponsive, it's time to replace the CR2032 button battery. Follow the battery installation steps in Section 5.1.
9. Troubleshooting
- No Display / Dim Display: Replace the CR2032 button battery. Ensure correct polarity.
- Incorrect Readings: Ensure the device is placed in a stable environment, away from direct sunlight, heat sources, or strong drafts that could affect readings. Allow a few minutes for readings to stabilize after placement or movement.
- No Backlight: This model does not feature a backlight function. Readings may be difficult to see in low-light conditions.
10. User Tips
- For optimal accuracy, place the device in a central location within the room, away from windows, doors, and air vents.
- The 3-level comfort indicator is a quick visual guide. For precise environmental control, refer to the exact temperature and humidity percentages.
- Remember that the device does not have a backlight, so consider its placement if you need to read it in the dark.
11. Frequently Asked Questions (FAQ)
- Q: What type of battery does this device use?
- A: It uses one CR2032 button battery.
- Q: Does this device have a backlight for night viewing?
- A: No, this model does not have a backlight function.
- Q: Is this a smart device compatible with Alexa or other smart home systems?
- A: No, this is not a smart device and does not have connectivity features like Alexa compatibility.
12. Support
For more detailed information or further assistance, please refer to the official user manual PDF available at: User Manual (PDF)