Introduction
The GEEVON Indoor Outdoor Thermometer provides accurate temperature and humidity readings for up to four different locations simultaneously. This wireless system includes a main display unit and three remote sensors, allowing you to monitor conditions in various areas of your home, garden, or other spaces. It features a large backlit LCD display, max/min records, temperature trend arrows, and an alarm clock function, making it a practical tool for maintaining a comfortable and healthy living environment.

Image: The main display unit of the GEEVON thermometer alongside its three remote sensors, showcasing the complete product package.
Package Contents
- 1 x Display Unit
- 3 x Outdoor Sensors
- 1 x User Manual
Please ensure all components are present before proceeding with setup.
Setup
Battery Installation
The main display unit requires 3 AAA batteries. Each remote sensor requires 2 AAA batteries. Batteries are not included.
- Open the battery compartment on the back of the main display unit. Insert 3 AAA batteries, ensuring correct polarity (+/-). Close the compartment.
- For each remote sensor, open the battery compartment. Insert 2 AAA batteries, ensuring correct polarity (+/-). Close the compartment.

Image: The main display unit shown with its integrated kickstand for tabletop use and a keyhole slot for wall mounting, illustrating flexible placement options.
Sensor Placement Guidelines
For optimal performance and accurate readings, consider the following:
- Place remote sensors vertically.
- Avoid direct sunlight and rain for outdoor sensors. The remote sensor is IPX4 splash-proof, but not waterproof.
- Do not place sensors horizontally or directly on the ground.
- Ensure the distance between the display screen and the sensors is within 200ft/60m in an open area. Walls and other obstructions may reduce the effective range.

Image: Visual instructions for optimal sensor placement, emphasizing vertical orientation, protection from direct elements, and maintaining wireless range.
Initial Pairing
Once batteries are installed in both the main unit and the remote sensors, they should automatically pair. If a sensor does not connect, ensure its channel switch (1, 2, or 3) matches the desired channel on the main unit, then press and hold the CH/A button on the main unit to initiate a search.

Image: An illustration demonstrating the use of the thermometer with three remote sensors placed in different environments: a bedroom, a greenhouse, and a wine cellar, highlighting its versatility.
Operating Instructions
Display Overview
The 3.8-inch large LCD display shows indoor and outdoor temperature and humidity readings, time, date, and max/min records. Temperature trend arrows indicate whether it's getting warmer or colder.

Image: A detailed view of the thermometer's large LCD display, highlighting its 3.8-inch screen size and various displayed information such as temperature, humidity, C/F selector, trend indicator, max/min records, 12/24H time, and alarm clock.
Button Functions
- CH/A Button: Press to cycle through the remote sensor channels (1, 2, 3, and 1-3 sequential display). Press and hold to initiate a search for remote sensors.
- MEM/V/C/F Button: Press to view maximum and minimum temperature/humidity records. Press and hold to clear records. Press to switch between Celsius and Fahrenheit.
- SNOOZE/LIGHT Button: Press to activate the soft white backlight for 10 seconds.

Image: The thermometer display unit illustrating its backlight feature, showing how the screen illuminates for 10 seconds when activated, enhancing readability in low-light conditions.
Temperature and Humidity Readings
The display shows current indoor and outdoor temperature and humidity. Trend arrows indicate whether the temperature or humidity is rising, falling, or remaining stable. The unit records 24-hour max and min readings for both indoor and outdoor environments.

Image: The thermometer display highlighting its ability to show historical maximum and minimum temperature and humidity records, aiding in monitoring environmental trends.
Time and Date Settings
The digital thermometer includes a built-in alarm clock (12/24H format) and calendar functions. Refer to the full user manual for detailed instructions on setting the time, date, and alarm.
Official Product Videos
Video: This official video from GEEVON Electronics provides a comprehensive overview of the Indoor Outdoor Thermometer Wireless with Backlight, demonstrating its features and functionality.
Video: An official video from GEEVON Electronics showcasing the Indoor Outdoor Thermometer with its three remote sensors, detailing how they work together to provide multi-location readings.
Maintenance
Cleaning
Wipe the display unit and sensors with a soft, damp cloth. Do not use abrasive cleaners or solvents, as they may damage the device.
Battery Replacement
Replace batteries when the low battery indicator appears on the display. Ensure to use fresh batteries of the correct type (AAA for main unit, AAA for sensors). Do not mix old and new batteries, or different battery types.
Storage
If storing the device for an extended period, remove all batteries to prevent leakage and corrosion.
Troubleshooting
No Reading from Remote Sensor
- Check if batteries are installed correctly and are not depleted.
- Ensure the remote sensor is within the 200ft/60m range of the main unit.
- Press and hold the CH/A button on the main unit to re-establish connection.
- Avoid placing sensors near large metal objects or strong electromagnetic interference.
Inaccurate Readings
- Allow the units to stabilize for at least 30 minutes after initial setup or relocation.
- Ensure sensors are not exposed to direct sunlight, heat sources, or extreme drafts.
- Verify that the remote sensor is placed vertically and not on the ground.
Specifications
- Product Dimensions: 0.6 x 3.25 x 4.5 inches; 6.4 ounces
- Item Model Number: GN-8688-3-CA
- Power Source: Battery Powered (Main Unit: 3 AAA, Sensors: 2 AAA each)
- Connectivity Technology: 433 MHz
- Special Features: Battery Operated, 3 Temperature Humidity Sensors, Alarm, Max & Min records, High Accuracy, 10 Seconds Backlight
- Material: Plastic, Metal, Acrylonitrile Butadiene Styrene (ABS)
- Recommended Uses: Office, Restaurant, Garden, Outdoor, Library, Laboratory, Indoor, Home
- Specific Uses: Temperature, Humidity, Time, Date
Warranty and Support
Geevon is committed to providing top-quality products and customer satisfaction. We design, manufacture, sell, and support our own product line directly to our customers.
For any questions, concerns, or support needs regarding your GEEVON Indoor Outdoor Thermometer, please contact our customer support team:
- Email: support@geevon.com
- Seller: GEEVON Electronics (View Seller Profile)
Please retain your purchase receipt for warranty purposes. Our customer support team is ready to assist you with any inquiries.