Product CC 520 / CC520 IP (wideband) (DISCONTINUED!) Catalog CC 520 w/ UI770: 2209 CC 520 IP: 2221 P/N CC 520: 5358 CC 520 IP: 504016 Warranty 3 years Compat Sennheiser Quick Disconnect Easy Connect Cord, Sennheiser Quick Disconnect Cord for Cisco Phones, Sennheiser Corded Headset Amplifier (UI770) (see Compat guide for best recommendation) Description Binaural headset with flexible omni-directional mic boom Set-Up Instructions Has an quick disconnect connection Manufacturer Sennheiser Manufactured in China Type Corded Wearing Style Monaural Cord Length 3’3”/39” Weight 3.5 oz Microphone Ultra noise-canceling, 150 Hz – 6.800 Hz Earpiece Active-Gard™ w/ foam, 150 Hz – 6.800 Hz Color Black & Silver Special Tech Ultra Noise Cancelling Battery Life N/A Reversible Yes Lifter Compatible No Busy Light Compat No Connections Quick Disconnect DC Adapter Compat No Digital Encryption N/A What's in the box? Headset, clothing clip, replacement foam and leatherette ear cushions, 3 colored ID clips, m…