1. Product Introduction
Thank you for choosing our brand's over-ear Bluetooth headset! This product is equipped with high-quality speaker units and supports Bluetooth wireless connection, combining comfortable wearing experience with clear sound quality. It is suitable for various scenarios such as music playback, voice calls and video entertainment.
2. Package Contents
- M5 Bluetooth Headset x 1
- USB Charging Cable x 1
- 3.5mm Audio Cable x 1
- Product User Manual x 1
3. Product Overview (Parts and Functions)
The M5 headset features a foldable design for portability and includes various controls and ports for versatile use.
Video: Demonstrating the M5 headset's foldable design and port locations.
3.1 Physical Components
- Earmuffs: Built-in speaker units and microphones, made of soft material that fits the ears closely and supports a certain angle of rotation.
- Headband: Adjustable length to fit different head shapes, with a built-in telescopic buffer structure for better stability.
3.2 Controls and Ports

Image: Detailed view of the control buttons and their functions.
- Power Button: Used for turning the headset on/off, entering pairing mode, and managing calls.
- Volume Buttons (+/-): Adjusts volume and navigates music tracks.
- Multi-function Button (Optional): Activates voice assistant, controls music playback (play/pause).

Image: Close-up of the headset's ports, including TF card slot, Type-C charging port, and 3.5mm audio jack.
- Charging Port: USB Type-C port for charging the headset.
- TF Card Slot: Supports TF memory cards for direct music playback.
- 3.5mm Audio Jack: For wired connection using the included 3.5mm audio cable.
- LED Indicator Light: Displays power, pairing, and charging status.
4. Setup: First Pairing and Connection
- Enter Pairing Mode: Long press the power button for 3 seconds until the LED indicator light flashes alternately red and blue. The headset will announce "Pairing Mode".
- Enable Bluetooth: On your mobile phone, tablet, or computer, turn on the Bluetooth function and search for available devices.
- Connect: Locate "M5" in the Bluetooth device list and select it to connect.
- Confirmation: After successful connection, the LED indicator light will turn solid blue, and the headset will emit a voice prompt indicating a successful connection.
- Automatic Reconnection: For subsequent use, the headset will automatically connect to the last paired device when turned on, if the device's Bluetooth is active and within range.
5. Operating Instructions
5.1 Basic Operations
- Power On/Off: Long press the power button for 3 seconds.
- Call Control:
- Short press the power button to answer incoming calls.
- Long press the power button to reject incoming calls.
- Double press the power button to redial the last call.
- Music Control: Short press the multi-function button (or center button) to play/pause music during playback.
- Mode Switch: Short press the 'M' button (if present) to switch between Bluetooth mode and MP3 mode.
5.2 Track and Volume Adjustment

Image: Detailed functions of the volume and track control buttons.
- Volume + Button: Short press to increase volume. Long press to skip to the next song.
- Volume - Button: Short press to decrease volume. Long press to go to the previous song.
5.3 Indicator Light Status
- Bluetooth Mode:
- Blue light flashes quickly during pairing.
- Solid blue after successful pairing.
- MP3 Mode: Blue light flashes slowly during music playback.
- Charging Mode:
- Solid red during charging.
- Indicator light turns off when charging is completed.
5.4 LINE External Audio Input Operation
- When the audio cable is inserted into the 3.5mm jack, the headset will automatically switch to AUX LINE IN mode. In this mode, the headset functions as a standard wired over-ear headset, and all buttons on the headset become inactive.
- Supports external audio input from mobile phones, MP3 players, CD players, laptops, and other devices.
6. Maintenance
6.1 Charging Notes
- Always use a reputable brand charger with a specification of 5V/1A for charging. Avoid using high-voltage chargers to prevent potential battery damage.
- It is normal for the headset to warm up slightly during charging. If you notice any severe overheating or unusual odors, immediately disconnect the power supply.
- If the headset will not be used for an extended period, it is recommended to charge the battery to approximately 50%, store it in a dry and cool environment, and recharge it every 1-2 months to maintain battery health.
6.2 Wearing and Using Notes
- Adjust the headband length gently to prevent damage from excessive stretching.
- To clean dirty earmuffs, gently wipe them with a clean, soft cloth lightly dampened with water. Do not immerse the headset in water or use corrosive cleaning agents.
- Avoid using the headset in high-temperature, humid, or dusty environments to protect internal components from damage.
7. Troubleshooting
| Troubleshooting Phenomenon | Possible Causes | Solutions |
|---|---|---|
| Unable to turn on the headset | Power exhausted | Connect to power supply and charge for 30 minutes, then try to turn it on again. |
| Bluetooth cannot find the headset | Not in pairing mode | Long press the power button until the red and blue lights flash alternately, then restart the terminal's Bluetooth. |
| No sound output after connection | Volume too low or terminal in mute mode | Turn up the volume of the headset and terminal, and turn off the terminal's mute mode. |
| The other party cannot hear the sound during a call | Microphone blocked | Check if the earmuff microphone is blocked by foreign objects and adjust the wearing position. |
| Intermittent sound quality and frequent disconnection | Too far distance or wireless interference | Move closer to the Bluetooth device and stay away from interference sources such as routers and microwave ovens. |
8. Specifications
8.1 Functional Parameters
- Bluetooth Version: 5.3
- Wireless Type: Bluetooth
- Communication: Wireless
- Vocalism Principle: Dynamic
- Sound Isolating: Yes
- Active Noise-Cancellation: Yes
- Microphone: Yes
- Control Button: Yes
- Volume Control: No
- Charging Method: Cable (Type-C)
- Battery Capacity: 280mAh (advertised 300mAh/400mAh in some descriptions, refer to product for exact)
- Battery Life (up to): 4 hours (continuous playback), 6 hours (continuous call duration)
- Standby Time: 100 Hours
- Charging Time: 1.5-2 hours
- Maximum Wireless Range: <10m
- Output Power: 35mW
- Bluetooth Working Frequency: 2.401-2.480GHz
- Signal-to-Noise Ratio: 88dB
- Material: PVC, ABS
- Headphone Pads Material: Other (Soft Protein Leather)
- Impedance Range: up to 32 Ω
- Waterproof: No
- NFC Technology: No
- Support Memory Card: Yes (TF Card)
- Plug Type: NONE (for wireless use), 3.5mm Audio Jack for wired use
8.2 Key Features
- Foldable design for convenient storage and travel.
- 40MM dynamic unit for rich bass and clear treble.
- Intelligent noise reduction (Active Noise Cancelling / ENC Physical Noise Reduction).
- Skin-friendly breathable earmuffs for comfortable all-day listening.
- Multi-mode playback: Bluetooth, TF card, and 3.5mm AUX cable.
- Broad compatibility with mobile phones, laptops, gaming consoles (PS4, Xbox), and desktops.

Image: Internal structure of the large diaphragm horn, highlighting pure copper coil and composite diaphragm for sound quality.

Image: Overview of core features including Bluetooth 5.3, precision cavity, surround stereo, and broad compatibility.
9. User Tips
- Sound Quality: If you find the sound quality to be 'so-so', try experimenting with different audio sources or adjusting the equalizer settings on your connected device to optimize the sound profile to your preference.
- Sound Leakage: To ensure the best audio experience and prevent sound from 'coming out' or being heard by others, make sure the earmuffs are properly seated over your ears, creating a good seal for optimal sound isolation.
- One Side Not Working: If only one side of the headphones is producing sound, first try re-pairing the headphones with your device. If the issue persists, check the 3.5mm audio cable connection (if using wired mode). If these steps do not resolve the problem, please refer to the Troubleshooting section or contact customer support.
10. Safety Information
WARNING
- CHOKING HAZARD: Small parts. Not for children under 3 years. To be used under direct supervision of an adult.
- When using the headset during activities such as riding or driving, always pay attention to your surroundings to ensure safety.
- Do not play music at high volume for extended periods to avoid potential hearing damage.
11. Warranty and Support
For detailed warranty information and customer support, please refer to the official product page or contact the seller directly. A PDF version of the user manual is available for download for more comprehensive instructions and diagrams.
PDF Manual: View User Manual (PDF)