This top-of-the-line model offers all-day comfort and superior sound quality. Its Sound Enhancement System lets you select bass or treble setting for fuller, richer tone. The lightweight monaural and binaural designs ensure comfortable extended-wear use. The convenient Quick Disconnect feature lets you walk away from your phone while still wearing your headset. This Headset is designed for Cisco IP Phones with Power Cube 7940, 7960, 7970. 

 

This part = H91 Headset + 26716-01 adapter cable for Cisco IP Phones

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