CS540 Wireless DECT Headset, Mono, Desk Phone, Noise-Canceling Mic Includes a CS540 wireless headset, CS540 headband, AC power adapter and telephone interface cable for desk phones

• Global Warranty & Wearing Style: 2 years; monoaural light weight convertible (which can be worn either over-the-ear, over-the-head or behind-the-head).
• Audio Performance: Keep background noise out of your call with a noise-canceling microphone.
• Talk Time & Roaming Range: Work Better, Hands Free, with a roaming range of up to 120 m/400 ft. Talk all day with up to 7 hours of talk time per charge.

Going from one place to another? Most bluetooth headsets have one mic for both voice and noise. With four noise-cancelling mics on the CS540 Wireless DECT Headset it filters out real world noise others cannot. This bluetooth earpiece has consistently outperformed other bluetooth headsets.