| Product Type | Headset |
| Series | WHM621 |
| Model | WHM621T |
| Brand | YEALINK |
| Form Factor | On-Ear |
| Wear Style | Headband |
| Audio Output Mode | Mono |
| Weight | 80 g |
| Power Supply | Rechargeable Lithium Battery |
| Battery Life (Talk time) | Up to 13 hours |
| Battery Life (Standby time) | Up to 90 hours |
| Charging Time | 2.5 hours |
| Max Operating Distance | 300 m |
YEALINK WHM621T DECT Wireless Mono On-Ear Headset

Key Benefits
Eye-Insights™ by Eye-In Technologies
AI-Powered Summaries from Online Customer Reviews
AI-Powered Summaries from Online Customer Reviews
Eye-Insights™ are generated by proprietary AI that analyzes real online customer reviews to highlight top pros and key product features. While we aim for accuracy, insights are provided “as-is” and individual results may vary.
- Designed for professionals who need freedom of movement with a 300-meter wireless range
- Exceptional voice clarity through advanced dual-microphone technology and wide audio frequency
- Lightweight and ergonomic on-ear form factor enables comfortable all-day usage without fatigue
Product Overview
WHM621 - Headset - DECT - Wireless - On-Ear - Mono - 20 - 20000 HZSpecifications
Product Overview
Audio Features
| Frequency Response (Headphones) | 20 - 20000 Hz |
| Frequency Response (Microphone) | 100 - 8000 Hz |
| Impedance | 32 ohms |
| Sensitivity | 92.5 dB |
| Microphone Type | ECM and MEMS dual microphone |
| Noise Cancelling Microphone | Yes |
| Speaker Driver Size | 28 mm |
| Microphone Features | Acoustic Shield Technology, Noise Suppression |
Physical & Environmental
| Operating Temperature | 0°C to 40°C |
| Relative Humidity (Operating) | 10% to 95%, non-condensing |
| Device Dimensions (Headset) | 149 mm x 120 mm x 52 mm |
| Device Dimensions (Base) | 87 mm x 91 mm x 90 mm |
Cloud Management & Licensing
| Compatible Platforms | Microsoft Teams, Zoom, UC platforms |
| Management Interface | Yealink USB Connect |
| Yealink Device Management Platform Compatible | Yes |
Interfaces
| Connectivity Technology | Wireless |
| Connection Interface | USB 2.0 |
| Base Station Interface | USB-A |
| Headset Interface to Base | DECT |
| Wireless Technology | DECT 6.0 |
Wireless Features
| Wireless Range | Up to 300 meters (line of sight) |
| Wireless Standard | DECT 6.0 |
| Multipoint Connectivity | Yes |
| Base Station Connectivity | USB-A for PC connection |
Compliance & Origin
| Country of Origin | China |
| Certifications | CE, FCC, RoHS, WEEE |
| DECT Certification | Yes |