Panasonic KX-TCA93 Clip-on Headset Over the Ear Headset Wear on Either Ear Standard 2.5mm Headset Plug Noise-Canceling Microphone Adjustable Boom Works For Either Ear In-Line Mute Control In-Line Volume Control 4ft. Cord 2.5mm connection Reversible for use with either ear Volume control plus mute Provides hands-free usage 4-foot cord