Panasonic Compact & Lightweight Hands-Free Over-The-Ear Clip-On Headset with Adjustable Microphone, Volume Control & Mute Switch For The Panasonic KX-TG6641B - KX-TG6642B - KX-TG6643B - KX-TG6644B & KX-TG6645B DECT 6.0 Cordless Phone & Answering System