ADDASOUND CRYSTAL2732 DUAL EAR NOISE CANCELLING HEADSETNoisecanceling microphone filters out ambient noise and interference1506800Hz wideband audio processing guarantees natural sound communicationMemory steel headband allows you to adjust it tighter or looser for the fit of your headRobust design and high quality materials withstand intensive daily useOver 25 rigorous, intense tests guarantee reliability and durabilityFlexible unibody boom design ensures durability and precise positioning of the microphoneUltralightweight design and soft foam ear cushions for allday comfortEasy deployment in different platforms such as desk phones and soft phones via a variety of QuickDisconnect cordsMaximum volume control protects the hearing under intensive usageOnly environmentalfriendly materials are used