1. Product Overview
The BN-LINK Digital Wireless Indoor Thermometer Hygrometer (Model CP-T12) is designed to provide accurate and real-time measurements of indoor temperature and humidity. Its compact design, high-precision sensors, and versatile placement options make it an ideal tool for monitoring environmental conditions in various settings.

Image 1: Front view of the BN-LINK Digital Wireless Indoor Thermometer Hygrometer displaying current temperature and humidity readings.
Key Features:
- Compact and Portable Design: Small and lightweight for easy placement and transport.
- High-Precision Sensors: Provides accurate temperature (±0.2°C) and humidity (±3%RH) measurements, with data updated every 4 seconds.
- Large Digital Display: Clear LCD screen shows current temperature, humidity, and comfort level indicators.
- Max/Min Record Function: Automatically tracks and displays the highest and lowest temperature and humidity values.
- Switchable Units: Easily switch between Celsius (°C) and Fahrenheit (°F).
- Energy Efficient: Low power consumption design ensures battery life of over 6 months.
- Multiple Installation Options: Can be placed on a desktop, mounted on a wall, or attached magnetically.
2. Setup
2.1 Battery Installation
- Locate the battery compartment cover on the back of the device.
- Slide the cover open.
- Insert two AAA alkaline batteries (included) according to the polarity markings (+/-) inside the compartment.
- Close the battery compartment cover securely. The device will power on automatically.

Image 2: Illustration of the battery compartment and proper battery insertion for the device.
2.2 Placement Options
The thermometer hygrometer offers flexible placement options:
- Desktop: Use the integrated kickstand to place the device on any flat surface.
- Wall Mount: Utilize the hook hole on the back to hang the device on a nail or screw.
- Magnetic Attachment: The device features magnets on the back for easy attachment to metallic surfaces like refrigerators.

Desktop placement using the stand.

Wall mounting using the hook hole.

Magnetic attachment to a metal surface.
For optimal accuracy, place the device away from direct sunlight, heat sources, and areas with high airflow.
3. Operating Instructions
3.1 Display Overview
The large LCD screen displays the following information:

Image 3: Detailed view of the LCD display, indicating temperature, humidity, and comfort level icons.
- Current Temperature: Shown in large digits at the top.
- Current Humidity: Shown in large digits at the bottom.
- MAX/MIN Temperature: Displays the highest and lowest recorded temperatures.
- MAX/MIN Humidity: Displays the highest and lowest recorded humidity levels.
- Comfort Level Indicator: An icon (e.g., DRY, COM, WET) indicates the current comfort level based on temperature and humidity.
- Battery Indicator: Shows the remaining battery life.
3.2 Switching Temperature Units (°C/°F)
To switch between Celsius and Fahrenheit, locate the °C/°F button on the back of the device. Press this button once to toggle the temperature unit.
3.3 Max/Min Record
The device automatically records the maximum and minimum temperature and humidity values since the last reset. These values are displayed alongside the current readings. The records will reset automatically every 24 hours or when the batteries are removed.
3.4 Bluetooth Connectivity (Optional)
This device supports wireless connectivity, allowing you to monitor temperature and humidity data remotely via a compatible smartphone application. Refer to the specific app instructions for pairing and advanced features, such as historical data tracking and alerts.

Image 4: The thermometer hygrometer displaying data, with an illustration of a smartphone app showing remote monitoring capabilities.
4. Maintenance
4.1 Battery Replacement
When the battery indicator on the display shows low power, replace the batteries promptly to ensure continuous and accurate readings. Follow the steps in Section 2.1 for battery installation.
4.2 Cleaning
To clean the device, wipe it gently with a soft, dry cloth. Do not use abrasive cleaners, solvents, or immerse the device in water, as this may damage the sensors and electronic components.
4.3 Storage
If the device will not be used for an extended period, remove the batteries to prevent leakage and store it in a cool, dry place away from direct sunlight and extreme temperatures.
5. Troubleshooting
- No Display/Blank Screen:
Check if the batteries are inserted correctly with the correct polarity. Replace with new batteries if necessary. - Inaccurate Readings:
Ensure the device is placed in a location free from direct sunlight, heat sources, or strong drafts. Allow the device to stabilize for at least 30 minutes after initial setup or relocation. Compare readings with another calibrated device if available. - Bluetooth Connectivity Issues:
Ensure Bluetooth is enabled on your smartphone and the device is within range. Restart both the device and your smartphone. Re-pair the device with the app if necessary. - Display Not Updating:
The device updates data every 4 seconds. If the display is frozen, try removing and reinserting the batteries.
6. Specifications
| Specification | Value |
|---|---|
| Manufacturer | BN-LINK |
| Model Number | CP-T12 |
| Item Weight | 160 g |
| Package Dimensions | 8.5 x 6.7 x 4.2 cm |
| Product Length | 6.5 cm |
| Outer Material | Plastic |
| Power Type | Battery Powered |
| Battery Type | Alkaline |
| Batteries Included | Yes |
| Temperature Accuracy | ±0.2°C |
| Humidity Accuracy | ±3%RH |
| Data Update Interval | 4 seconds |
| ASIN | B0C32FVC73 |
| UPC | 810079581818 |
7. Warranty and Support
For warranty information and customer support, please refer to the documentation included with your product packaging or visit the official BN-LINK website. Contact details for technical assistance and service inquiries can typically be found there.





