1. Introduction
The BFOUR BF-40 PRO is an upgraded wireless digital meat thermometer designed to help you achieve perfect cooking results every time. Featuring dual waterproof probes, Bluetooth 5.2 connectivity, and a high-definition LCD display, this thermometer allows for precise temperature monitoring for various cooking methods including grilling, smoking, oven baking, and more. Its smart alarm system and multi-function app ensure you never overcook your food.

2. Package Contents
Please check the box to ensure all items are present:
- 1 x Wireless Meat Thermometer (Booster Unit)
- 2 x Zirconia Ceramic Probes (Black and White)
- 1 x USB-C Charging Cable
- 1 x User Manual
3. Key Features
- Large LCD Display: Easy-to-read screen on the booster unit shows battery life, connection signal, current temperature, and preset temperature without needing the mobile app.
- Accurate, Heat-Resistant Probes: Dual probes with ±1.8°F (±1°C) accuracy. Ceramic handles withstand temperatures up to 752°F (400°C).
- 100% Waterproof Dual Probes: Upgraded zirconia ceramic probes feature durable and waterproof sealing, making them easy to clean. Probes are color-coded (black and white) for easy identification.
- Extended Battery Life: The booster unit provides 90+ hours of operation on a 3-hour charge. Each probe offers 40+ hours of use from a quick 2-minute charge.
- Stable Bluetooth 5.2 Connection: Ensures a reliable wireless range of up to 328 feet (100 meters) for seamless remote monitoring.
- Dual Alarm Alerts: Both the booster unit and the mobile app provide simultaneous alerts when your target temperature is reached.
- Multi-Function App: Includes 12 USDA presets for various meats, customizable temperature settings, target temperature alerts, high/low temperature alerts, and an alarm history.




4. Specifications
| Feature | Detail |
|---|---|
| Model Number | BF-40 PRO |
| Remote Range | Up to 328 feet (100 meters) |
| Bluetooth Version | 5.2 |
| Probe Length | 11 cm (4.3 inches) |
| Internal Temperature Range (Probe Tip) | 32°F to 212°F (0°C to 100°C) |
| Ceramic Handle Temperature Range | 32°F to 752°F (0°C to 400°C) |
| Temperature Accuracy | ±1.8°F (±1°C) |
| Booster Battery Life | 90+ Hours |
| Booster Charge Time | 3 Hours |
| Probe Battery Life | 40+ Hours |
| Probe Charge Time | 2 Minutes |
| Charging Method | USB-C |
| Waterproof Rating | IP67 Certified (Probes) |
| DIY Supplies | Electrical |

5. Setup Guide
5.1 Initial Charging
- Charge the Booster: Connect the booster unit to a USB-C power source using the provided cable. A full charge takes approximately 3 hours and provides 90+ hours of use.
- Charge the Probes: Insert the probes into their respective slots in the booster unit. The probes will charge automatically. A 2-minute charge provides 40+ hours of use.

5.2 App Download and Pairing
- Download the App: Search for the official BFOUR app on your smartphone's app store (iOS or Android).
- Enable Bluetooth: Ensure Bluetooth is enabled on your smartphone.
- Pair Device: Open the BFOUR app. The app should automatically detect and connect to your BF-40 PRO booster unit. Follow any on-screen prompts to complete the pairing process.
6. Operating Instructions
6.1 Probe Insertion
- Carefully remove the desired probe(s) from the booster unit.
- Insert the probe into the thickest part of the meat, avoiding bones.
- Important: Ensure the probe is inserted deep enough to cover the safety groove (indicated on the probe shaft) to get an accurate internal temperature reading.
- The internal temperature sensing range of the probe tip is 32°F to 212°F (0°C to 100°C). Do not exceed this range for the internal food temperature. The ceramic handle can withstand higher ambient temperatures up to 752°F (400°C).


6.2 Monitoring Temperatures
You can monitor temperatures using either the booster unit's LCD display or the mobile app:
- Booster Display: The large LCD on the booster unit will show the current and preset temperatures for both probes, along with battery and connection status.
- Mobile App: The app provides a more detailed interface, allowing you to select meat types, customize target temperatures, view temperature graphs, and receive smart alerts.


6.3 Cooking Applications
The BF-40 PRO is versatile and can be used for a wide range of cooking methods:
- Grill
- Smoker
- Rotisserie
- Oven
- Pan Frying
- Air Fryer

7. Maintenance and Care
- Cleaning Probes: After each use, wash the metal probes thoroughly in soapy water. The probes are 100% waterproof.
- Cleaning Booster Unit: Clean the booster unit by hand using a damp cloth. Do not completely immerse the booster unit in water for extended periods.
- Storage: Store the probes in their designated slots within the booster unit when not in use. Keep the device in a dry place.

8. Important Safety Warnings
- Hot Probes: Always use oven mitts or heat-resistant gloves when handling hot probes. Do not touch hot probes with bare hands.
- Booster Unit Placement: The booster unit is not designed for high heat environments. Do not leave the booster unit inside an oven, grill, or smoker while cooking. Place it outside the cooking appliance within Bluetooth range.
- Probe Temperature Limits: The internal temperature sensing tip of the probe must not exceed 212°F (100°C). While the ceramic handle can withstand up to 752°F (400°C), prolonged exposure of the probe tip to temperatures above 212°F (100°C) can damage the sensor.
- Liquid Immersion: While the probes are 100% waterproof, the main booster unit should not be fully immersed in water for extended periods.
- Children: Keep the thermometer and its components out of reach of children.
9. Troubleshooting
- Q: The thermometer is not connecting to my phone.
- A: Ensure Bluetooth is enabled on your phone and the BFOUR app is open. Make sure the booster unit is charged and within the 328 ft (100m) Bluetooth range. Try restarting both the app and the booster unit.
- Q: I am getting inaccurate temperature readings.
- A: Verify that the probe is inserted correctly into the thickest part of the meat, past the safety groove, and not touching any bones. Ensure the internal temperature of the probe tip does not exceed 212°F (100°C). Clean the probes thoroughly after each use.
- Q: The probes are not charging.
- A: Ensure the booster unit itself is charged. Check that the probes are correctly seated in their charging slots. If the issue persists, try using a different USB-C cable or power adapter for the booster.
10. User Tips
- For best accuracy, always insert the probe into the center of the thickest part of the food, away from bones.
- Utilize the color-coded probes (black and white) to easily distinguish between different cuts of meat or cooking stages when using both simultaneously.
- Take advantage of the app's USDA presets for common meats, but don't hesitate to customize target temperatures for personal preference or specific recipes.
- Keep the booster unit in a clear line of sight to your phone for optimal Bluetooth connection range, especially in outdoor environments.
- Remember to remove the probes from the food before carving or serving to avoid damage.
11. Warranty and Support
BFOUR is committed to providing high-quality products and excellent customer service. For any inquiries, technical support, or warranty claims regarding your BF-40 PRO Wireless Digital Meat Thermometer, please contact our customer support team.
You can typically reach customer support through the "Contact Seller" button on the product page where you made your purchase. Please have your order details ready to expedite the support process.





