Panasonic Hands-Free Headset with Foldable Comfort Fit Lightweight Headband & Flexible Optimum Voice Microphone with Volume Control & Mute Switch For The Panasonic KX-TGA939T - KX-TG9391T - KX-TG9392T - KX-TG9393T & KX-TG9394T DECT 6.0 2-Line Cordless Telephone Adjustable, Flexible, Boom-Style, Noise-Canceling Microphone Provides Optimum Voice Clarity Level and Reduces Background Noise Hands-Free, Over the Head, Comfortable and Lightweight Design Reversible for use with Either Ear, right or left Convenient In-Cord Volume Control & Mute Switch with a 4 foot cord and lapel clip for unfettered movement Uses standard 2.5-millimeter jack, designed for use with almost all cordless phone