Wireless range up to 350 feet.Noise-canceling microphone.Wideband speaker.The multi-function button allows you to answer/end calls on the headset or you can dock/undock the headset from the base station.DECT is a secure protocol compared to Bluetooth.Use multiple headsets in the same area without them interfering with each other.You can have conference calls with up to four headsets.Volume control and microphone mute can be adjusted on the headset.Dock in the base to recharge.Comfortable headband wearing style.