The Bell ZeroNoise is a brand new amplification that delivers a clean sound with the likes of professional intercoms and endless power. A state of the art digital processor performs the active noise cancelling and further sound settings are available. It is compatible with any helmet intercom kit with Nexus connectors, although the system delivers best performances with the ZERONOISE intercom kit range It is fully compatible with all ZERONOISE INTERCOMS KIT/HEADSET.