Circle(TM) SC 230 (single-sided) and SC 260 (dual-sided) are business wired headsets designed for busy contact centers and office professionals. They offer Sennheiser Voice Clarity, all-day wearing comfort and robust quality for busy contact center and office professionals. The combination of features that promote productivity and durability helps your people perform at their best. Focus fully on the conversation If you work in a noisy call center or office, you\'ll appreciate the voice clarity in the Circle Series headsets. With a noise-cancelling microphone and HD wide-band sound, every word comes through crisp and clear for you and the other party. It\'s as if you\'re having a face-to-face conversation. Bendable boom arm With the bendable boom arm, your microphone always stays in the best position. It simply cannot be twisted out of place. Pivot perfect placement Wear it on the right. Wear it on the left. It\'s up to you. The mic rotates 350? but always stays perfectly placed.