1. Introduction
Thank you for choosing the OBET Indoor Outdoor Thermometer. This device provides accurate, real-time temperature and humidity readings for multiple locations, both indoors and outdoors. With its wireless sensors and adjustable backlight, it's designed for convenience and clear visibility. Please read this manual carefully to ensure proper setup and operation.

Figure 1: OBET Indoor Outdoor Thermometer Main Unit and 3 Wireless Sensors.
2. What's Included
Your package should contain the following items:
- 1 x Main Thermometer Display Unit
- 3 x Wireless Remote Sensors
- 1 x USB Cable
- 1 x Instruction Manual
3. Setup Guide
3.1 Powering the Main Unit
The main display unit can be powered by either batteries or the included USB cable.
- Battery Power: Open the battery compartment on the back of the main unit and insert 3 x AAA batteries (not included), paying attention to polarity.
- USB Power: Connect the included USB cable to the DC 5V port on the side of the main unit and plug the other end into a USB power adapter (not included). The backlight will remain on continuously when powered via USB.

Figure 2: Main unit showing battery compartment and USB port. The main unit requires 3 AAA batteries or can be powered via USB cable.
3.2 Installing Batteries in Wireless Sensors
Each wireless sensor requires 2 x AA batteries (not included). Ensure correct polarity when inserting.

Figure 3: Wireless sensor with its battery compartment open. Each sensor requires 2 AA batteries.
3.3 Pairing Outdoor Sensors with the Station
The wireless thermometer will automatically search for RF signals from the outdoor sensors once powered on. The red LED indicator on the sensor will flash during transmission. If pairing fails, follow these steps:
- Ensure all sensors have batteries installed and are within range of the main unit.
- Press the "CH" button on the main unit to select the corresponding channel (1, 2, or 3) for the sensor you wish to pair.
- Long press the "CH" button on the main unit to search for the sensor signal.
- Once connected, the sensor icon will become stable on the display.
- The weather station will search for the signal every 3 minutes to ensure continuous updates.
Video 1: Official OBET video demonstrating the setup and pairing process for the wireless thermometer and its sensors. It shows how to insert batteries and how the main unit receives signals from the sensors.
3.4 Sensor Placement Guidelines
For accurate readings, consider the following when placing your wireless sensors:
- Mount the sensor vertically at least 6 feet off the ground.
- Ensure good airflow around the sensor.
- Avoid direct sunlight, as it can inflate temperature readings. A north-side, shaded location is best.
- Be aware of heat sources such as soffit or dryer vents, windows, or door frames.
- The sensors have a range of up to 500ft (150m) in open areas.

Figure 4: Illustration of optimal sensor placement in various indoor and outdoor environments, highlighting the 500ft transmission range.

Figure 5: Example scenarios for sensor placement, including office, kitchen, incubator, and winery, demonstrating the versatility of the system.
4. Operating Instructions
4.1 Display Overview
The main unit's LCD screen displays indoor and outdoor temperature and humidity for up to 3 remote sensors, along with air comfort indicators.

Figure 6: The main display unit clearly showing temperature and humidity readings for indoor and three outdoor channels.
4.2 Temperature Unit Selection (°C/°F)
Press the "°C/°F" button on the back of the main unit to switch between Celsius and Fahrenheit display.
4.3 Backlight Adjustment
When powered by USB, the backlight stays on continuously. You can adjust its brightness (high, low, off) by touching the "LIGHT" button on the top of the unit. When powered by batteries, the backlight turns off after 10 seconds to save energy; touch the "LIGHT" button to activate it again.

Figure 7: The main unit demonstrating three adjustable backlight levels (100%, 50%, 0%) for optimal visibility in various lighting conditions.
4.4 Daily Max/Min Data
The thermometer automatically records and resets maximum/minimum temperature and humidity records every 24 hours. Press the "RECORD" button to view:
- Press once: Maximum indoor and outdoor temperature/humidity records.
- Press twice: Minimum indoor and outdoor temperature/humidity records.
- Press three times: Return to normal display.
Press the "CLEAR" button to delete the highest and lowest temperature and humidity values since the last reset.

Figure 8: Visual representation of 24-hour maximum and minimum temperature and humidity trends, aiding in environmental monitoring.
4.5 Air Comfort Indicators
The display features 3 air comfort indicators (Dry, Comfort, Wet) based on humidity levels:
- Dry: Humidity < 40%
- Comfort: Humidity 40% - 70%
- Wet: Humidity > 70%

Figure 9: The display unit showing the air comfort indicator, which uses icons to represent dry, comfortable, or wet humidity levels.
4.6 Low Battery Indicator
A low battery symbol will appear near the outdoor temperature reading if the wireless sensor batteries need replacement. A low battery symbol will appear near the indoor temperature reading if the main unit batteries need replacement.
5. Maintenance
- Clean the unit and sensors with a soft, damp cloth. Do not use abrasive cleaners.
- Replace batteries promptly when the low battery indicator appears to ensure continuous accurate readings.
- Avoid exposing the main unit to direct sunlight or extreme temperatures.
6. Troubleshooting
- No readings on display: Ensure batteries are correctly installed in both the main unit and sensors. If using USB power, ensure the cable is securely connected.
- Inaccurate readings: Check sensor placement according to guidelines (Section 3.4). Avoid direct sunlight, heat sources, or areas with poor airflow.
- Loss of signal: Reposition sensors closer to the main unit. Long press the "CH" button on the main unit to re-establish connection.
7. Specifications
| Brand | OBET |
| Model | B63 |
| Power Source (Main Unit) | 3 x AAA Batteries or USB Cable (DC5V=0.5A) |
| Power Source (Sensors) | 2 x AA Batteries per sensor |
| Temperature Accuracy | +/-1.8°F (1°C) |
| Humidity Accuracy | +/-5% |
| Outdoor Temp Range | -50°F ~ 158°F (-45°C ~ 70°C) |
| Humidity Range | 20% ~ 95% |
| Wireless Range | Up to 500ft (150m) in open area |
| Display Type | LCD |
| Material | Metal, Plastic |
8. Warranty and Support
OBET provides a one-year warranty service for this product. Additionally, 30 days of return and exchange are available on Amazon for a better experience.
For any questions, technical support, or product information, please contact us:
- Email: obet_us@hotmail.com
- Website: www.obet.store