Provides high quality sound performance using in-car speakers By using in-car speakers, KlaT7 provides outstanding sound performance compared to visor type hands-free. It uses front 2 speakers for calls and 4 speakers for music playback. Noise cancellation and Echo reduction With Digital Signal Processor(DSP), it provides crystal clear sound performance through echo reduction and noise cancellation. Dual Microphone Recipient can listen your voice clearly by using dual microphone.