Poly Savi 8220 Office Stereo Headset tunes out noise and nearby conversations with a noise-canceling microphone and 112-decibel Sound Pressure Level (SPL). Close-conversation limiting feature lets you stay in the zone with active noise-canceling for crystal-clear calls. Charge lasts up to 13 hours of talk time and takes up to 3 hours to fully charge. Roam freely up to 590' to enjoy calls even away from your desk. Button controls feature call answer/end, mute, volume, power on/off and ANC on/off. Manage all your calls with a compatible single base that offers three-way connectivity to your computer, desk phone and mobile device. Make training and collaboration easy by conferencing up to four headsets onto a single base. DECT security-certified headset ensures your conversation stays private. An IT manager's dream, this headset was created for communication and is optimized and certified to work with top virtual meeting providers. On-ear cups are made of artificial leather for comfort.