Optimum sound quality and best hearing protection Thorough equipped with the latest DSP (Digital Signal Processors), offers the GN 8210 Individually tailored to your needs sound quality and maximum protection against noise and acoustic stimuli. Reinforced by the GN 8210 incoming signal and background noise, : such as from cars or from the Cubicle filters, users always benefit from a superb sound quality. At the same time the automatic volume control Guarantees did the volume of an incoming call remains at a comfortable listening level preset by the user. Diese Eliminates the constant monitoring and adjustment, benefit from significant transmission while Maintaining sound quality. Product features: Background noise is reduced for incoming calls Automatically adjust the volume of incoming calls 3 audio for unsurpassed protection modes to choose hearing protection with all GN Netcom headsets compatible