These intercom headsets are compatible with Terratrip Professional Plus+ V2 intercom amplifiers and also Peltor amplifiers. They are available for open face or full face helmets and feature noise cancelling microphones for improved communication clarity. Full face microphones have a hook and loop pad on the back for attaching to the inside of the helmet chin bar and open face microphones include a helmet mounted flexible boom for optimum positioning.Compatible with Terratrip Professional Plus+ V2 and Peltor intercom amplifiersNoise cancelling microphones for improved communication clarityOptions available for open face or full face helmetsUniversal helmet fitting, suits most Motorsport helmetsTerratrip intercom headsets feature a male Nexus jack plug for connection and may be compatible with other makes of intercom amplifier which have a female Nexus jack socket.