Binaural Savi 7210 Office Headset Wireless DECT headset for landline phones Conferencing of up to 4 headsets on one base Flexible microphone arm with Noise Cancelling Call control: Answer/decline/end, mute, volume +/- Talk time: Up to 12 hours Wireless range: Up to 120 m (line of sight) 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