Poly Savi 8220 Office Stereo Headset tunes out noise & nearby conversations with a noise-canceling microphone & 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 & 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 & ANC on / off. Manage all your calls with a compatible single base that offers three-way connectivity to your computer, desk phone & mobile device. Make training & 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 & is optimized & certified to work with top virtual meeting providers. On-ear cups are made of artificial leather for comfort.