Plantronics M120 Wired 2.5mm lightweight mobile ear loop headset for cordless phones with active noise canceling for clear calls (Three Pack) Start your call with Sleek over-the-ear headset design can be worn on left or right ear Noise canceling microphone Enjoy easy hands-off conversations while you go about your business; no more dangers from not having both hands on the wheel! Optical voice clarity with noise-canceling for crystal calls, microphone keeps your voice clear even in noisy environments Hands free convenience while driving safely with both hands on the wheel or multi-tasking at home or the office Cordless Phones equipped with a 2.5mm headset jack Compatible with telecoil-equipped hearing aids