The ZeroNoise Pit-Link Phone Headset connects directly to a smart phone using a 3.5mm jack plug or directly to the Pit-Link amplifier via a USB-C plug enabling pit to car / kart communication. As the phone call reaches the amplifier the connection from car / kart to pit is on. This system replaces entirely a radio system and does not require a licence.High efficiency speakersDynamic noise cancelling microphoneFlexible microphone boomHigh hearing protectionThe headset provides high hearing protection while being lightweight and comfortable. The high efficient speakers are suitable for voice or music, together with the dynamic noise cancelling microphone and flexible boom. Available with a push to talk button.