Poly Savi 8210-M Single-Ear Headset tunes out noise & nearby conversations with a noise-canceling microphone & close-conversation limiting. Being able to talk for a long time on a single charge means work gets done. With the freedom to roam up to 590', you can keep calls going even away from your desk. Charge lasts up to 13 hours of talk time & only takes up to 3 hours to fully charge. Headset features three-way connectivity to your computer, desk phone & mobile device for convenient conferencing. Make training & collaboration easy with the ability to conference up to four headsets on a single base. DECT security-certified headset ensures your conversation remains private. Headset is Microsoft Teams certified to take your Microsoft Teams experience to the next level using a button for instant access to the app & more.