1. Introduction
Thank you for choosing the Geevon Wireless Indoor Outdoor Digital Thermometer. This device provides accurate temperature and humidity measurements for up to four different locations simultaneously: one indoor and three outdoor/remote. It features a large LCD display, Max/Min records, comfort level indicators, and temperature/humidity alerts to help you monitor your environment effectively.
2. Product Overview
2.1 Components
The Geevon Wireless Thermometer system includes a main display unit and three remote sensors.

2.2 Key Features
- Accurate Temperature & Humidity: Measures indoor and outdoor temperature and humidity with high precision.
- Multi-Sensor Monitoring: Supports up to three remote sensors for monitoring different locations up to 60 meters (200 feet) away.
- Large LCD Display: Easy-to-read screen shows current, Max/Min records, and trend arrows.
- Comfort Level Indicators: Icons indicate whether the environment is Dry, Comfortable (COM), or Wet.
- Temperature/Humidity Alerts: Customizable Hi/Lo alarm settings for temperature and humidity.
- °C/°F Selector: Easily switch between Celsius and Fahrenheit.

3. Setup
3.1 Battery Installation
- Remote Sensors: Open the battery compartment on each remote sensor. Insert 2 AAA batteries (not included), ensuring correct polarity (+/-). Close the compartment.
- Main Display Unit: Open the battery compartment on the back of the main unit. Insert 2 AA batteries (not included), ensuring correct polarity (+/-). Close the compartment.
Note: It is recommended to install batteries in the remote sensors first, then in the main unit, to ensure proper synchronization.
3.2 Sensor Synchronization
After battery installation, the main unit will automatically search for signals from the remote sensors. The remote sensor readings (Channel 1, 2, 3) will appear on the display. If a sensor does not connect, press the 'CH/▲' button on the main unit to manually search for channels, or press the 'TX' button inside the remote sensor's battery compartment to resend the signal.
3.3 Placement Recommendations
Place the main unit indoors in a central location. The remote sensors can be placed outdoors or in other rooms, basements, wine cellars, gardens, or greenhouses. Ensure sensors are protected from direct sunlight and rain for accurate readings and longevity.

3.4 Mounting Options
The main display unit and remote sensors offer flexible mounting options:
- Tabletop Stand: The main unit has a built-in kickstand for placement on a desk or shelf.
- Wall Mount: Both the main unit and remote sensors have hang holes for wall mounting.

4. Operating Instructions
4.1 Display Overview
The large LCD screen displays indoor temperature and humidity, along with the readings from the three remote sensors (Channel 1, 2, 3). Trend arrows indicate whether temperature/humidity is rising, falling, or stable. Comfort icons (Dry, COM, Wet) provide a quick assessment of the environment.
4.2 Switching Temperature Units (°C/°F)
Press the 'MEM/▼' button once to toggle between Celsius (°C) and Fahrenheit (°F) display.
4.3 Max/Min Records
Press the 'MEM/▼' button repeatedly to view the maximum and minimum temperature and humidity records for the past 24 hours. The display will cycle through current readings, maximum readings, and minimum readings. To clear the Max/Min records, press and hold the 'MEM/▼' button for 3 seconds.
4.4 Setting Hi/Lo Alarms
The device supports customizable high and low temperature and humidity alarms. Refer to the detailed instructions in the full manual for specific steps on setting these alerts. When an alarm threshold is reached, an audible alert will sound.
4.5 Channel Selection
Press the 'CH/▲' button to manually cycle through the remote sensor channels (1, 2, 3) or to activate auto-cycling mode, which displays each channel's data for a few seconds before moving to the next.
5. Maintenance
- Cleaning: Wipe the display unit and sensors with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Battery Replacement: Replace batteries when the low battery indicator appears on the display. Ensure to use fresh batteries of the correct type (AA for main unit, AAA for sensors).
- Storage: If storing the device for an extended period, remove all batteries to prevent leakage.
6. Troubleshooting
- No Display/Faint Display: Check battery polarity and ensure batteries are fresh. Replace if necessary.
- No Remote Sensor Reading: Ensure batteries are installed correctly in the sensor. Press the 'TX' button inside the sensor's battery compartment. On the main unit, press 'CH/▲' to search for channels. Ensure sensors are within the 60m (200ft) transmission range and free from major obstructions.
- Inaccurate Readings: Allow the device and sensors to stabilize for at least 30 minutes after setup. Ensure sensors are not in direct sunlight, near heat sources, or in areas with extreme drafts.
- Intermittent Signal: Reduce the distance between the main unit and sensors. Avoid placing units near large metal objects or electronic devices that may cause interference.
7. Specifications
| Feature | Specification |
|---|---|
| Indoor Temperature Range | -10 °C to 60 °C (14 °F to 140 °F) |
| Outdoor Temperature Range | -50 °C to 70 °C (-58 °F to 158 °F) |
| Temperature Accuracy | ± 1 °C |
| Humidity Range | 20% to 95% RH |
| Humidity Accuracy | ± 5% RH |
| Transmission Range | Up to 60 meters (200 feet) in open air |
| Wireless Frequency | 433 MHz |
| Main Unit Power | 2 x AA batteries (not included) |
| Remote Sensor Power | 2 x AAA batteries (not included) |
| Product Dimensions (Main Unit) | 12.95 x 10 x 1.5 cm (5.1 x 3.9 x 0.6 inches) |
| Product Weight | 340.19 grams |
8. Warranty and Support
Geevon products are designed for reliability and performance. For any questions, technical support, or warranty inquiries, please refer to the contact information provided with your purchase or visit the official Geevon website. Please retain your proof of purchase for warranty claims.





