Fanvil DH401B OWS Bluetooth Headset

Fanvil DH401B OWS Bluetooth Headset

The fanvil DH401B ows bluetooth headset is an open-wear sound (OWS) Bluetooth headset designed for professional communication across mobile and desk-based VoIP environments. It weighs just 13.6 g and uses an ear-hook form factor that keeps the ear canal open throughout the workday. The DH401B targets users who need consistent call clarity without sacrificing awareness of their immediate surroundings.

Key Features:

1. Open-Ear Design and Physical Comfort

The DH401B uses an open-ear architecture rather than an in-ear or over-ear design. This approach provides two practical advantages. First, it eliminates contact with the ear canal, which reduces hygiene concerns in shared or high-use environments. Second, it preserves ambient sound perception, allowing the wearer to remain aware of colleagues, alarms, or movement around them.

At 13.6 g, the headset sits comfortably over the ear for extended periods. The ear-hook secures the unit without clamping pressure. Dimensions measure 90.2 × 40.5 × 27.4 mm, keeping the profile compact during transit and desk use alike.

2. Bluetooth 5.4 Multipoint Connectivity

The DH401B runs on Bluetooth 5.4, the current revision of the standard at time of manufacture. Supported profiles include HFP, A2DP, and AVRCP, covering hands-free calls, stereo audio streaming, and media control respectively.

Multipoint functionality allows the Fanvil DH401B to maintain simultaneous connections to two devices. In practice, this means a user can stay connected to both a smartphone and a PC without manually switching pairings. The stored pairing list holds up to 8 devices, and the operational range extends to 10 m. The DH401B is specifically validated for use with LINKVIL Portable Phones and Fanvil VoIP Phones, making it a direct pairing choice within those ecosystems.

3. Dual-Mic AI Noise Cancellation

The Fanvil DH401B carries two omnidirectional analog microphones, each with a sensitivity of -38 dBFs/Pa and a frequency range of 100 Hz to 8 kHz. Together, they feed into two active processing layers:

• AI Environment Noise Cancellation (AI ENC) — filters background environmental noise in real time
• Acoustic Echo Cancellation (AEC) — removes echo caused by speaker output being re-captured by the microphones

Both layers operate simultaneously during calls. The result is a cleaner voice signal at the receiving end, particularly in open-plan offices, transit environments, or outdoor settings where ambient noise levels are variable. Full-duplex technology additionally allows both parties to speak and be heard at the same time without clipping.

4. Speaker Performance

The speaker unit measures 18 × 11 mm with a maximum input power of 30 mW. Key acoustic parameters are:

• Sensitivity: 122 dB
• Impedance: 16 Ω
• Full frequency range: 20 Hz to 20 kHz
• Music mode bandwidth: 100 Hz to 20 kHz
• Speech mode bandwidth: 100 Hz to 8 kHz

The DH401B supports AAC and SBC audio codecs. AAC provides higher audio fidelity when paired with compatible devices, while SBC serves as the universal fallback. Speaker output furthermore complies with EN50332, the European standard for hearing protection in personal audio devices.

5. Battery and Charging Case

The headset battery is a 60 mAh rechargeable lithium polymer cell. On a single charge, it delivers:

• 5 hours of talk time
• 8 hours of music playback
• 11 days of standby

The portable charging case houses a 400 mAh lithium polymer battery and extends total usage significantly. Combined battery life with the case reaches 23 hours of talk time and 36 hours of music playback. The case includes a visible battery indicator, allowing the user to check remaining charge at a glance. Charging time for the Fanvil DH401B is 2 hours via the included 0.6 m USB cable.

Who the Fanvil DH401B Suits

The DH401B is well-matched to users whose work environment and call volume align with its specific feature set:

• Field sales and mobile workers — The 23-hour combined talk time and portable charging case mean a full working day of calls is achievable without access to a desk charger. Bluetooth 5.4 with a 10 m range adds freedom of movement.
• Receptionists and front-desk operators — The open-ear design maintains awareness of walk-in visitors and office activity while handling calls. This matters in environments where physical interaction and phone calls overlap.
• VoIP desk users on Fanvil systems — The DH401B is validated for compatibility with LINKVIL Portable Phones and Fanvil VoIP Phones. Users within those telephony ecosystems benefit from confirmed device pairing without additional configuration steps.
• Hybrid workers switching between phone and PC — Bluetooth multipoint keeps the Fanvil DH401B connected to both a smartphone and a computer simultaneously. There is no need to disconnect and re-pair when moving between call types.
• Open-plan office workers — Dual-mic AI ENC and AEC reduce the effect of background office noise on outgoing call quality. The open-ear design simultaneously prevents the social isolation associated with in-ear noise-cancelling headsets.

Fanvil DH401B OWS Bluetooth Headset Technical Specifications

Microphone

Speaker

Audio Features

Connectivity

Headset Battery

Charging Case Battery

Physical Specifications

Compliance

Package Contents

• Fanvil DH401B OWS Bluetooth Headset
• Charging case
• USB cable
• Quick Start Guide
• Safety Information & Declaration