Wireless headset for desk phones gives workers more flexibility and confidence with up to 400' of roaming range and up to 12 hours of talk time after each charge. Your team will be able to collaborate simply since teams can conference up to four headsets on a single base. Easy integration offers instant use with more than 800 analog and IP desk phones from industry-leading makers. The stylish, adjustable headband provides a comfortable fit for all head sizes. Optimize range, save power and maximize office space with the DECT adaptive power system. It automatically adjusts wireless signal strength based on the distance from the headset base. The rechargeable, 250 mAh lithium ion battery requires just three hours to fully charge. SoundGuard DIGITAL technology protects against sound levels above 118 decibels for safe use, and anti-startle detects and eliminates any sudden increases in signal level. Flexible noise-canceling microphone ensures your voice is heard even in noisy environments.