Style, comfort and audio quality Clear, natural and rich audio with wideband audio - a noise-cancelling microphone - along with enhanced digital signal processing (DSP). SoundGuard: Acoustic limiting for protection against sounds above 118 dBA, A lightweight metal headband offers durability and a comfortable custom fit Corded simplicity and reliability Workers instinctively know how to use blackwire 3300 series. It\'s UC corded for plug and play simplicity. Great value, feel the quality Comfortable headset that looks and sounds professional Key Features Colour: Black Connector: USB-A Dimensions: 2.9 x 15.5 x 12.9 cm