Do you have a cordless telephone that you can barely hear the other person talking or they can't hear you? The following are Plantronics headsets specifically designed to use with a cordless telephones. Plantronics cordless phone headsets are optimized to be used with any wireless/cordless phone with a built-in 2.5mm jack so they eliminate the low volume problem of most cordless phone headsets. Plantronics Headsets for Cordless Phones combines an innovative design with a noise-canceling microphone, resulting in a stable, great-sounding headsets.