1. Introduction
Thank you for choosing the Tronsmart OpenFly 2 Pro Open-Ear Bluetooth Earbuds. These earbuds are designed to provide exceptional sound quality and comfort while keeping you aware of your surroundings, making them ideal for sports and active use. Featuring SoundPulse & abTube Balance Tech, crystal clear calls, and extended playtime, the OpenFly 2 Pro offers a premium listening experience.
Video: Tronsmart OpenFly 2 Pro Product Overview
2. Package Contents
- 1 x Tronsmart OpenFly 2 Pro Open-Ear Wireless Headphones
- 1 x Charging Case
- 1 x USB-C Charging Cable
- 1 x Warranty Card
3. Product Overview
Familiarize yourself with the components of your Tronsmart OpenFly 2 Pro earbuds and charging case.

Image: Tronsmart OpenFly 2 Pro Earbuds and Charging Case

Image: Diagram showing Indicator of Headphones, Multifunctional Touch Button, Charging Contacts of Headphones, USB-C Charging Port, Charging Contacts of Charging Case, Reset Button, and Indicator of Charging Case.
4. Specifications
| Feature | Specification |
|---|---|
| Brand Name | Tronsmart |
| Model | OpenFly 2 Pro |
| Style | OWS ear hook headphones |
| Material | Plastic |
| Communication | Wireless (Bluetooth) |
| Bluetooth Version | 5.3 |
| Bluetooth Profile | HFP/HSP/AVRCP/A2DP |
| Maximum Wireless Range | 10m-20m (33ft-66ft) |
| Vocalism Principle | Dynamic |
| Number Of Drivers | 4 |
| Frequency Response Range | 20 - 20000Hz |
| Impedance Range | up to 32 Ω |
| Codecs | sbc |
| Battery Capacity (Charging Case) | 500mAh |
| Playtime (Headphones) | 10 Hours (single charge) |
| Total Playtime (with Charging Case) | Up to 40 Hours |
| Charging Time (Headphones) | 1.5 Hours |
| Charging Time (Charging Case) | 2 Hours |
| Charging Method | Charging case (USB-C) |
| Waterproof Rating | IPX5 |
| Features | Waterproof, With microphone, Volume Control, Control Button, Support APP |
| Voice Assistant Built-in | No |
| NFC Technology | No |
| Sound Isolating | No (Open-Ear Design) |
| Active Noise-Cancellation | No |
| Headphone Dimensions | 34x52x15.8mm (1.34x2.05x0.62inch) |
| Headphone Weight | 8.8g (0.019lbs) |
| Charging Case Dimensions | 76.3x61.5x25mm (3.00x2.42x0.98inch) |
| Total Weight (with Charging Case) | 74.5g (0.16lbs) |

Image: Detailed dimensions and weight of the earbuds and charging case.
5. Setup
5.1 Charging the Earbuds and Case
- Place the earbuds into the charging case. Ensure the charging contacts align.
- Connect the USB-C charging cable to the charging port on the case and a power source.
- The indicator on the charging case will show charging status. A full charge for the case takes approximately 2 hours.
- The earbuds take about 1.5 hours to fully charge inside the case.
Note: The headphones support fast charging, with 10 minutes of charge providing approximately 3 hours of battery life. The charging case itself does not support fast charging.
5.2 Pairing with Your Device
- Open the charging case. The earbuds will automatically enter pairing mode.
- On your device (smartphone, tablet, etc.), enable Bluetooth.
- Search for "Tronsmart OpenFly 2 Pro" in the list of available Bluetooth devices.
- Select it to connect. Once connected, you will hear a confirmation sound.
5.3 Wearing the Earbuds
The OpenFly 2 Pro earbuds are designed for open-ear comfort and a secure fit, especially during active use.
- Gently place the ear hook over your ear.
- Adjust the earbud speaker to rest comfortably near your ear canal without entering it directly.
- Ensure a snug fit that allows you to hear your surroundings while enjoying audio.

Image: Open-Ear Comfort - Immerse in unrivaled comfort during active use.
6. Operating Instructions
6.1 Power On/Off
- Power On: Open the charging case, or take the earbuds out of the case.
- Power Off: Place the earbuds back into the charging case and close the lid.
6.2 Music Playback
- Play/Pause: Tap the Multifunctional Touch Button once on either earbud.
- Next Track: Double-tap the Multifunctional Touch Button on the right earbud.
- Previous Track: Double-tap the Multifunctional Touch Button on the left earbud.
- Volume Up: Press and hold the Multifunctional Touch Button on the right earbud.
- Volume Down: Press and hold the Multifunctional Touch Button on the left earbud.
6.3 Call Management
- Answer/End Call: Tap the Multifunctional Touch Button once on either earbud.
- Reject Call: Press and hold the Multifunctional Touch Button on either earbud for 2 seconds.

Image: Crystal Clear Call - 4 mics with AI noise reduction algorithm, stay connected on-the-go.
6.4 Voice Assistant
- Activate Voice Assistant: Triple-tap the Multifunctional Touch Button on either earbud.
6.5 App Control
The Tronsmart OpenFly 2 Pro supports customization via the Tronsmart app.
- Download: Download the Tronsmart app from Google Play (for Android) or the Apple App Store (for iOS).
- Features: Use the app to customize EQ settings and access other features.
7. Maintenance
7.1 Cleaning
- Regularly clean the earbuds and charging case with a soft, dry cloth.
- If charging issues occur, gently wipe the metal charging contact pins on the headphones and the charging pins inside the charging case with a damp tissue.
7.2 Storage
- When not in use, store the earbuds in their charging case to protect them and keep them charged.
- Store in a cool, dry place away from extreme temperatures.
7.3 Water Resistance (IPX5)
The Tronsmart OpenFly 2 Pro earbuds are IPX5 water-resistant, meaning they can withstand splashes and sweat. They are suitable for workouts and outdoor activities.
- Do NOT immerse the earbuds in water.
- They are NOT suitable for use while diving or swimming.
- Ensure the earbuds are dry before placing them back into the charging case to prevent damage.

Image: Safe & Sound - Stay connected to environments even while enjoying tunes.
8. Troubleshooting
- Q: Do the headphones support fast charging?
- A: The headphones support fast charging, with 10 minutes providing around 3 hours of battery life. The charging case does not support fast charging.
- Q: What is the Bluetooth range?
- A: Over 10m/33ft.
- Q: How long does it take to charge?
- A: The charging case takes 2 hours to fully charge. The earbuds take 1.5 hours.
- Q: Are the headphones suitable for use while diving or swimming?
- A: No, they are not suitable for diving or swimming.
- Q: Where can I download the Tronsmart app?
- A: Download the Tronsmart app from Google Play and the Apple App Store to personalize your sound.
- Q: What should I do if the headphones cannot be turned on?
- A: With both headphones placed inside the charging case, try leaving the case to charge for at least 1 hour. Also, try using a damp tissue to wipe the metal charging contact pins on the headphones and the charging pins inside the charging case.
- Q: I can't detect OpenFly 2 Pro via Bluetooth. What should I do?
- A: Hold the Reset button on the charging case for 15 seconds to reset the earbuds.
9. User Tips
- Quick Charge for Quick Use: If you're in a hurry, remember that a quick 10-minute charge of the earbuds can give you approximately 3 hours of listening time.
- Ensure Clean Contacts: If you experience issues with the earbuds not turning on or pairing, a common solution is to clean the metal charging contacts on both the earbuds and inside the charging case with a slightly damp tissue. This ensures a good connection.
- Bluetooth Reset: If your device struggles to detect the OpenFly 2 Pro via Bluetooth, a simple reset can often resolve the issue. Just hold the Reset button on the charging case for 15 seconds.
10. Warranty & Support
Tronsmart products are built to the highest quality standards. This product is covered by a warranty from the date of purchase. For detailed warranty information and support, please refer to the warranty card included in your package or visit the official Tronsmart website.





