New in R2.5: SINC+
SINC+ provides additional noise suppression, and when combined with the existing noise suppressor offers enhanced noise suppression, while using a single microphone on the radio. Such noise suppression would only be available when a dual microphone accessory such as the INC RSM is used.
A Charge for Software (CfS) licence is required to enable this feature. The part number is HKVN4371A.