The Valiant from ZeroNoise is an entry level amplifier ideal for clubman competitors. The amp features analogue noise cancelling and independent volume controls for the driver and co-driver. Powered by either a 9v battery or it can be hard wired into the 12v vehicle electrics. Compatible with helmets and intercom headsets which have a male 6.35mm stereo jack plug,Analogue noise cancelling to reduce unwanted noiseDual volume controls to get the perfect balance between driver and co-driver2m Long helmet / headset connection cables9v battery powered or 12v power cable to connect to the vehicle (battery not included)Female 6.35mm stereo connectorsThe ZeroNoise Valiant amplifier is suitable for use with ZeroNoise Valiant intercom headsets.