1. Introduction and Overview
The ZONGJI BY01 (JM13/JM13Pro) OWS Wireless Bluetooth Earphones are designed to provide a high-quality audio experience with comfort and convenience. These open-ear headphones feature advanced Bluetooth connectivity, long battery life, and a durable, waterproof design, making them suitable for various activities including sports and daily use. A unique feature is the dual functionality, allowing the charging case to also act as a portable speaker.
Key features include:
- Open OWS (Open Wireless Stereo) design for comfortable, non-in-ear wear.
- Bluetooth 5.3 (or 5.4 in some variants) for stable and fast connections.
- HIFI Sound quality with a 16mm composite diaphragm moving coil.
- Long battery life: up to 5 hours of music playback, 4 hours of call time, and up to 36 hours with the charging case.
- Dual Headphones + Audio: The charging case can function as a practical HD audio speaker.
- IPX5 life-grade waterproof and dustproof rating.
- Smart HD Call functionality with intercom noise reduction.
- Lightweight and ergonomic design for comfortable, sensless wear.
- Touch control support.



2. Setup and First Use
2.1 Charging the Earphones and Charging Case
Before first use, ensure both the earphones and the charging case are fully charged.
- Place the earphones into the charging case.
- Connect the charging case to a power source using the provided Type-C charging cable.
- The charging indicator lights (if present) on the case and earphones will show charging status.
- Headset charging time: Approximately 0.8 hours.
- Charging box charging time: Approximately 1.5 hours (some variants 1-2 hours).
- A 1-hour charge can provide approximately 120 minutes of range.


2.2 Pairing with a Bluetooth Device
Follow these steps to pair your earphones with your smartphone or other Bluetooth-enabled device:
- Ensure the earphones are charged and within range of your device (within 10-15 meters).
- Open the charging case. The earphones will automatically enter pairing mode (indicated by flashing lights, if available).
- On your device, go to Bluetooth settings and turn Bluetooth on.
- Search for available devices. You should see "BY01" or a similar name (e.g., "JM13") appear in the list.
- Select the earphone name to connect. Once connected, a voice prompt or indicator light will confirm successful pairing.
- The earphones feature Quick Connect for seamless re-pairing with previously connected devices.

3. Operating Instructions
3.1 Basic Controls (Touch Control)
The BY01 earphones support touch control for various functions. Specific touch gestures may vary slightly, but common functions include:
- Play/Pause: Single tap on either earbud.
- Next Track: Double tap on the right earbud.
- Previous Track: Double tap on the left earbud.
- Answer/End Call: Single tap on either earbud.
- Reject Call: Long press on either earbud.
- Activate Voice Assistant (Siri/Alexa): Triple tap on either earbud.
- Volume Control: The earphones support volume control, typically through specific touch gestures or via your connected device.

3.2 Making and Receiving Calls
With the integrated microphone and HD Call feature, you can manage calls hands-free:
- Answering Calls: Tap either earbud once.
- Ending Calls: Tap either earbud once during a call.
- Rejecting Calls: Press and hold either earbud for approximately 2 seconds.
- The earphones feature intercom noise reduction for clearer conversations.
3.3 Audio Playback
Enjoy HIFI sound quality for your music and other audio content:
- Music Playback Time: Up to 5 hours on a single charge (some variants 4-5 hours).
- Total Playback Time: Up to 36 hours with multiple charges from the charging case.
- The 16mm composite diaphragm moving coil ensures powerful low frequency and soft vocals.

3.4 Speaker Mode (Charging Case)
The charging case of the BY01 earphones can also function as a portable HD audio speaker. To activate and use this feature:
- Ensure the earphones are removed from the charging case.
- The charging case should automatically enter speaker mode or can be activated via a specific button/gesture (refer to visual cues on the case).
- The case will connect to your device via Bluetooth, allowing you to play audio through its integrated speaker.
- This feature provides a versatile 2-in-1 audio experience.


4. Maintenance and Care
To ensure the longevity and optimal performance of your ZONGJI BY01 earphones, follow these maintenance guidelines:
- Cleaning: Gently wipe the earphones and charging case with a soft, dry, lint-free cloth. For stubborn dirt, a slightly damp cloth can be used, but ensure no moisture enters any openings.
- Water and Dust Resistance: The earphones are IPX5 rated, meaning they are protected against low-pressure water jets from any direction and are dustproof. They can cope with outdoor exercise on rainy and cloudy days. However, they are not designed for submersion in water. Avoid exposing them to excessive moisture or harsh chemicals.
- Storage: When not in use, store the earphones in their charging case to protect them from dust, scratches, and accidental damage. Store in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: To preserve battery health, avoid fully discharging the battery frequently. Charge them regularly, even if not used for extended periods.


5. Troubleshooting
If you encounter issues with your ZONGJI BY01 earphones, try the following troubleshooting steps:
5.1 Earphones Not Pairing
- Check Battery: Ensure both earphones and the charging case have sufficient charge.
- Restart Devices: Turn off and on your Bluetooth device (smartphone, tablet, etc.) and place the earphones back in the case, then take them out again.
- Clear Pairing History: On your device, forget or unpair "BY01" from the Bluetooth settings, then attempt to pair again following the instructions in Section 2.2.
- Distance: Ensure the earphones are within 10-15 meters of your device.
5.2 No Sound or Low Volume
- Volume Level: Increase the volume on both your connected device and the earphones.
- Re-pair: Disconnect and re-pair the earphones with your device.
- Check Audio Output: Ensure your device's audio output is set to the earphones.
- Clean Earphones: Check for any debris blocking the speaker grilles and gently clean them.
5.3 Charging Issues
- Check Cable and Adapter: Ensure the Type-C charging cable and power adapter are working correctly. Try a different cable or adapter.
- Clean Charging Ports: Check for any debris in the charging port of the case and the charging contacts on the earphones. Gently clean them.
- Proper Placement: Ensure the earphones are correctly seated in the charging case.
6. Specifications
Below are the detailed specifications for the ZONGJI BY01 (JM13/JM13Pro) Wireless Bluetooth Earphones:
| Feature | Specification |
|---|---|
| Brand Name | ZONGJI |
| Model Number | BY01 (JM13/JM13Pro) |
| Bluetooth Version | 5.3 (some variants may feature 5.4) |
| Communication | True wireless |
| Wireless Type | Bluetooth |
| Maximum Wireless Range | <10m (effective range 10-15m) |
| Style | Open-ear |
| Earcups Type | Semi-open |
| Vocalism Principle | Dynamic |
| Driver Diameter | 8mm (16mm composite diaphragm moving coil for sound) |
| Number Of Drivers | 2 |
| Impedance Range | up to 32 Ω (16Ω specified) |
| Resistance | 16Ω |
| Frequency Response Range | 20 - 20000Hz |
| Sensitivity | 42dB |
| Max Output | 5mW |
| Total Harmonic Distortion | 5% |
| Headphone Battery Capacity | 40mAh (per earbud) |
| Charging Case Battery Capacity | 300mAh |
| Battery Life (Music) | Approx. 5 hours (single charge), up to 36 hours (with charging case) |
| Battery Life (Call) | Approx. 4 hours (some variants 5-6 hours) |
| Standby Time | Up to 60 days (some variants 30 hours) |
| Headset Charging Time | 0.8 hours |
| Charging Case Charging Time | 1.5 hours (some variants 1-2 hours) |
| Charging Method | Charging case, Type-C connector |
| Waterproof Rating | IPX5 |
| Features | Waterproof, With microphone, Amazon Alexa Support, Apple Siri Support, Detachable Cable (referring to lanyard), Voice assistant built-in, Sound Isolating, Touch Control, Dual Headphones + Audio (charging case as speaker) |
| Material | Metal, Plastic, Silica Gel |
| Package List | User Manual, Charging case, Carrying Bag, Charging Cable |
| Certification | CE, FCC, RoHS |


7. Warranty and Support
Your ZONGJI BY01 Wireless Bluetooth Earphones come with a standard manufacturer's warranty. Please refer to your purchase documentation or contact the seller for specific warranty terms and conditions.
- Free Returns: Free returns are available within 90 days of purchase.
- Fast Delivery Guarantee: If delivery is delayed, you may be eligible for a $1.00 coupon code. Refunds are also available if the package is lost or items are damaged during transit, or if there is no delivery within 60 days.
- Security & Privacy: Your personal details are protected and not shared with third parties without consent.
For technical support, warranty claims, or any other inquiries, please contact the seller directly through the platform where you made your purchase.