The Poly Voyager 5200CD Office USB-A monaural headset moves with you to meetings in and out of the office. One-way base station for connecting a desk phone and PC/Mac Bluetooth connectivity with mobile devices Noise-cancelling microphone filters out background noises WindSmart technology filters out disturbing wind and ambient noise SoundGuard DIGITAL: Sound levelling for listening comfort and acoustic limiting for protection against sounds above 118 dBA Talk time: Up to 7 hours Standby time: Up to 9 days Wireless range: Up to 75 m (line of sight) Battery capacity: 122 mAh Charging time: 1.5 hours Bluetooth 5.0 CD = Computer/Desk phone Calls can be answered/ended through the headset: manufacturer-specific Electronic Hook Switch (EHS) module required (sold separately). Please inform us of your phone model so that we can find the compatible EHS cable. Please note: We recommend using Poly Lens software with this product. This enables central management of video devices, headsets, phones and webcams. Other benefits: - Custom device settings - Always the latest firmware - Easy troubleshooting tool - Fast device integration - Dashboard layout with intelligent news feed