Call Center Headset Headphones + Adjustable Volume + Mute Control For Phone NEC Aspire Electra Elite DTerm Series E Models DTU-8 DTU-8D DTU-16 DTU-16D DTU-32 DTU-32D DPT-8 DPT-8D DPT-16 DPT-16D DPT-32 DPT-32D DTerm Series Aspire Ip Telephone Direct Connect Over The Head Headset, No Additional Applifiers / Adapters Required. Built-In volume adjustable and mute button control. Shirt clip included. Soft Leathered Ear Cushions For All Day Comfort. Superior Quality Sound with the Flexible Adjustable Microphone. Headband Style with Single Earpiece for Great Sound Quality in One Ear.