Introduction
The TempPro B65S is a wireless digital hygrometer and thermometer designed to monitor temperature and humidity both indoors and outdoors. It features a large, backlit touchscreen display for easy readability, even in low light conditions. The remote sensor is rainproof and rechargeable, providing accurate readings up to 200 feet away. This manual provides detailed instructions for setting up, operating, maintaining, and troubleshooting your device to ensure optimal performance and comfort.

Image: The TempPro B65S main display unit and its accompanying wireless remote sensor.
Package Contents
Please verify that all components are present in your package:
- 1 x TempPro B65S Main Display Unit
- 1 x Wireless Remote Sensor
- 2 x AAA Batteries (for main unit)
- 1 x USB Charging Cable (for remote sensor)
- 1 x User Manual (this document)
Setup
1. Installing Batteries in the Main Unit
- Locate the battery compartment on the back of the main display unit.
- Open the battery cover.
- Insert 2 AAA batteries, ensuring correct polarity (+/-).
- Close the battery cover securely.
2. Charging the Remote Sensor
The remote sensor contains a rechargeable lithium battery. Before first use, fully charge the sensor.
- Connect the provided USB charging cable to the charging port on the remote sensor.
- Plug the other end of the USB cable into a USB power adapter (not included) or a computer USB port.
- The charging indicator light on the sensor will illuminate during charging and turn off when fully charged.

Image: Internal chip responsible for accurate temperature and humidity readings.
3. Pairing the Main Unit and Remote Sensor
The main unit and remote sensor should automatically pair once both are powered on. If pairing does not occur:
- Place the main unit and remote sensor close to each other.
- On the main unit, press and hold the 'CH SYNC' button for 3 seconds to initiate the pairing process.
- The main unit will search for the sensor, and once connected, the outdoor temperature and humidity will display.

Image: Illustration of the 200-foot wireless range and the capability to connect with up to three additional sensors (one sensor included).
4. Placement Guidelines
- Main Unit: Place the main unit indoors in a central location, away from direct sunlight, heat sources, or vents that could affect readings. It can be placed on a tabletop using its integrated stand, mounted on a wall using the hanging hole, or attached to a metal surface via its magnetic back.
- Remote Sensor: Place the remote sensor outdoors in a shaded, dry location, protected from direct rain and sunlight. Ensure it is within the 200-foot wireless range of the main unit. Avoid placing it near large metal objects or electronic devices that could interfere with the wireless signal.

Image: Demonstrates the versatile mounting options for the main unit, including a tabletop stand, wall mount, and magnetic attachment.
Operating Instructions
Display Overview

Image: Detailed view of the B65S display, highlighting the touch-sensitive buttons for various functions.
- OUT CH1: Displays outdoor temperature and humidity from the connected sensor.
- IN: Displays indoor temperature and humidity measured by the main unit.
- CH SYNC: Used to switch between multiple outdoor channels (if additional sensors are connected) or to re-sync sensors.
- Light Bulb Icon: Activates the backlight for easy viewing in dim conditions.
- °F/°C HISTORY: Toggles between Fahrenheit and Celsius temperature units. Press and hold to view historical MAX/MIN records.
- MAX/MIN CLEAR: Displays the maximum and minimum temperature/humidity records. Press and hold to clear the records.
Switching Temperature Units (°F/°C)
To switch between Fahrenheit (°F) and Celsius (°C), simply touch the '°F/°C HISTORY' button on the touchscreen display. The unit will instantly change.
Viewing and Clearing MAX/MIN Records
The device tracks the highest (MAX) and lowest (MIN) temperature and humidity readings for both indoor and outdoor environments.
- To view MAX records: Touch the 'MAX/MIN CLEAR' button once.
- To view MIN records: Touch the 'MAX/MIN CLEAR' button a second time.
- To clear all MAX/MIN records: Press and hold the 'MAX/MIN CLEAR' button for 3 seconds. The records will reset to the current readings.

Image: The display showing the maximum and minimum recorded values for temperature and humidity.
Backlight Function
To activate the backlight for improved visibility in dark environments, simply touch the 'Light Bulb Icon' button. The backlight will remain on for a few seconds before automatically turning off to conserve battery.

Image: The B65S main unit displaying readings with its backlight activated, suitable for night viewing.
Trend Indicators
The display includes trend arrows that indicate whether the temperature and humidity are rising, falling, or remaining stable. This helps you anticipate changes in your environment.
- Up Arrow (↑): Indicates rising temperature/humidity.
- Down Arrow (↓): Indicates falling temperature/humidity.
- Horizontal Arrow (→): Indicates stable temperature/humidity.
Maintenance
Cleaning
Wipe the display unit and remote sensor with a soft, damp cloth. Do not use abrasive cleaners or immerse the units in water. The remote sensor is rainproof but not waterproof; avoid prolonged exposure to heavy rain or submersion.
Battery Replacement (Main Unit)
When the battery indicator on the main unit shows low power, replace the 2 AAA batteries. Ensure correct polarity.
Recharging the Remote Sensor
When the low battery indicator for the outdoor sensor appears on the main unit, recharge the remote sensor using the provided USB cable. A full charge ensures continuous operation.

Image: Illustrates various indoor and outdoor locations where the remote sensor can be effectively placed for monitoring.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No outdoor reading or '---' displayed. | Sensor out of range, low sensor battery, interference, or not paired. | Move sensor closer to main unit. Recharge sensor battery. Avoid placing near large metal objects. Re-sync sensor by pressing 'CH SYNC' on main unit. |
| Inaccurate readings. | Sensor/main unit exposed to direct sunlight, heat sources, or vents. | Relocate units to a shaded area, away from direct heat or cold sources. Allow time for readings to stabilize. |
| Display is dim or blank. | Low batteries in main unit. | Replace AAA batteries in the main unit. |
| Backlight not working. | Low batteries in main unit. | Replace AAA batteries in the main unit. |
| Cannot switch °F/°C. | Incorrect button press. | Ensure you are touching the '°F/°C HISTORY' button correctly. |
Specifications
- Model: B65S
- Indoor Temperature Range: Not explicitly stated, typically 0°C to 50°C (32°F to 122°F)
- Outdoor Temperature Range: Not explicitly stated, typically -40°C to 70°C (-40°F to 158°F)
- Humidity Range: 10% to 99% RH
- Temperature Accuracy: ±2°F (±1.1°C)
- Humidity Accuracy: ±2~3% RH
- Wireless Range: Up to 200 feet (60 meters) in open air
- Display: 4-inch LCD Touchscreen with Backlight
- Power Source (Main Unit): 2 x AAA batteries (included)
- Power Source (Remote Sensor): Rechargeable Lithium Battery (charged via USB)
- Product Dimensions: Main Unit: 3.35 x 1.01 x 4.31 inches; Remote Sensor: 2.9 x 2.4 x 1.0 inches (approximate, based on image)
- Mounting Options: Tabletop Stand, Wall Mount, Magnetic Back

Image: Visual representation of the compact size and dimensions of both the main display unit and the remote sensor.
Warranty and Support
TempPro products are designed for reliability and performance. For specific warranty details, please refer to the warranty card included with your product or visit the official TempPro website. If you encounter any issues or require technical assistance, please contact TempPro customer support through their official channels. Keep your purchase receipt as proof of purchase for warranty claims.
Official TempPro Store: Visit TempPro Store on Amazon


