1. Introduction
Thank you for purchasing the Sanwa Direct Bluetooth Headset. This manual provides detailed instructions on how to set up, operate, and maintain your new headset. Please read this manual thoroughly before use to ensure proper functionality and to extend the lifespan of your device.
Figure 1: Sanwa Direct Bluetooth Headset and Charging Stand
2. Product Overview
2.1 Key Features
- Wireless Freedom: Bluetooth 5.0 connectivity eliminates tangled cables, allowing you to move freely during calls.
- Convenient Charging Stand: Simply place the headset on the included stand for easy charging. The headset also has a USB Type-C port for direct charging.
- Microphone Mute Button: A dedicated mute button on the microphone allows for quick mute/unmute without software interaction. An audible buzzer reminds you when muted.
- Extended Battery Life: Offers approximately 20 hours of continuous talk time and 23 hours of music playback, providing up to 2 days of use for an 8-hour workday.
- Unidirectional Microphone: Designed to pick up your voice clearly while minimizing ambient noise.
- Multi-Pairing Support: Connects to two devices simultaneously.
- Ambidextrous Design: The rotating microphone arm allows the headset to be worn on either the right or left ear.
- Lightweight and Comfortable: Weighing approximately 64g, with a large earpad (5cm diameter) and adjustable band for a comfortable fit during long periods of use.
2.2 Components
The package includes the following items:
- Bluetooth Headset (Model: 400-BTMH023BK)
- Charging Cradle
- USB Charging Cable (approx. 60cm)
- User Manual (Japanese)
Figure 2: Headset in use, demonstrating wireless freedom.
Figure 3: Headset can be worn on either the left or right ear.
3. Setup
3.1 Charging the Headset
Before first use, fully charge the headset. There are two ways to charge:
- Using the Charging Cradle: Place the headset onto the charging cradle. Ensure the headset is properly seated for the charging contacts to align. The charging indicator LED on the headset will light up (usually red) during charging.
- Direct USB Type-C Connection: Connect the included USB charging cable to the headset's USB Type-C port and to a USB power source (e.g., computer USB port, USB wall adapter).
Charging time is approximately 2 hours.
Figure 4: Charging the headset using the cradle.
Figure 5: Both cradle and direct USB-C charging methods.
3.2 Bluetooth Pairing
- Ensure the headset is fully charged and powered off.
- Press and hold the Multi-Function Button (MFB) on the headset until the LED indicator flashes blue and red, indicating pairing mode.
- On your device (smartphone, PC, tablet), enable Bluetooth and search for available devices.
- Select "400-BTMH023BK" from the list of found devices.
- Once paired, the LED indicator on the headset will flash blue slowly.
For multi-pairing, repeat the pairing process with a second device. The headset can maintain a connection with two devices simultaneously.
4. Operating Instructions
4.1 Power On/Off
- Power On: Press and hold the MFB for approximately 3 seconds until the LED indicator flashes blue.
- Power Off: Press and hold the MFB for approximately 5 seconds until the LED indicator flashes red and then turns off.
4.2 Call Handling
- Answer Call: Short press the MFB.
- End Call: Short press the MFB during a call.
- Reject Call: Press and hold the MFB for approximately 2 seconds when a call comes in.
- Mute/Unmute Microphone: Press the dedicated mute button located on the microphone arm. When muted, a buzzer sound will play every 3 seconds to remind you.
Figure 6: Location of the microphone mute button.
Figure 7: The mute reminder buzzer helps prevent accidental muted conversations.
4.3 Volume Control
Use the volume buttons located on the earcup to adjust the audio volume.
- Volume Up: Press the '+' button.
- Volume Down: Press the '-' button.
Figure 8: On-device controls for volume and calls.
4.4 Microphone Adjustment
The microphone arm is flexible and can be rotated to position the microphone optimally for your voice. Ensure the microphone is close to your mouth for clear audio pickup, especially since it is unidirectional.
Figure 9: Adjusting the unidirectional microphone.
5. Maintenance
5.1 General Care and Cleaning
- Wipe the headset and charging cradle with a soft, dry cloth.
- Do not use abrasive cleaners, solvents, or strong chemicals.
- Keep the charging contacts on the headset and cradle clean and free of dust.
5.2 Battery Care and Storage
To ensure optimal battery performance and longevity:
- Avoid storing or using the headset in direct sunlight, near fire, or in areas with high temperatures or high humidity.
- Do not store or charge the device in locations such as a car dashboard or near a window where it may be exposed to direct sunlight.
- These conditions can lead to accidents or malfunctions.
- Charge the headset regularly, even if not in frequent use, to maintain battery health.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Headset does not power on. | Battery is depleted. | Charge the headset fully. |
| Cannot pair with device. | Headset not in pairing mode; Device Bluetooth off; Out of range. | Ensure headset is in pairing mode (flashing blue/red LED). Turn on Bluetooth on your device. Move headset closer to the device (within 10m). |
| No sound or poor sound quality. | Volume too low; Headset not connected; Bluetooth audio quality limitations. | Increase volume on headset and device. Reconnect the headset. While Bluetooth headsets offer convenience, microphone audio quality may be lower than wired connections. Speak clearly and ensure microphone is positioned correctly. |
| Microphone not working or unclear. | Microphone muted; Microphone not positioned correctly; Background noise. | Unmute the microphone. Adjust the microphone arm to be close to your mouth. The unidirectional microphone helps reduce background noise, but extreme noise may still affect clarity. |
| Buzzer sound during calls. | Microphone is muted. | This is a feature to remind you that the microphone is muted. Unmute the microphone if you wish to speak. |
7. Specifications
| Feature | Specification |
|---|---|
| Model Number | 400-BTMH023BK |
| Color | Black |
| Headset Dimensions (W×D×H) | Approx. 168 × 52 × 169 mm |
| Charging Cradle Dimensions (W×D×H) | Approx. 75 × 70 × 30 mm |
| Headset Weight | Approx. 64 g |
| Charging Cradle Weight | Approx. 156 g |
| Bluetooth Version | Ver 5.0 (backward compatible with Ver 4.2/4.1/4.0/3.0/2.0/1.2) |
| Transmission Method | GFSK |
| Supported Codec | SBC |
| Frequency Range | 2.402～2.480GHz |
| Communication Distance | Max approx. 10m |
| Supported Profiles | HSP/HFP/A2DP/AVRCP |
| Power Source | Built-in Lithium Polymer Battery |
| Charging Time | Approx. 2 hours |
| Continuous Talk Time | Approx. 20 hours |
| Continuous Music Playback Time | Approx. 23 hours |
| Standby Time | Approx. 660 hours |
| Playback Frequency Band | 20～20,000Hz |
| Microphone Sensitivity | -43dB±3dB |
| Microphone Directivity | Unidirectional |
| Charging Connector | USB Type-C |
| Material | Plastic |
| Country of Origin | China |
Note: Actual communication distance and usage times are theoretical values and may vary depending on the usage environment and conditions.
8. Warranty and Support
8.1 Warranty Period
This product comes with a warranty period of 6 months from the date of purchase. Please retain your proof of purchase for warranty claims.
Please note that battery degradation is generally not covered under warranty.
8.2 Customer Support
For any inquiries, technical support, or warranty claims, please contact Sanwa Direct customer service. Refer to the contact information provided on the product packaging or the official Sanwa Direct website.
