Using professional-grade equipment, Speedcom Communications has designed and produced the ultimate In-Car intercom system on the market. Designed with student-instructor scenarios in mind, the 2MPI Intercom is portable and operates on either 4x AA batteries, or with a permanent 12V power source. Extra loud, high-quality sound features independent driver/co-driver volume controls for easy control of noise levels. Built-in intercom leads with IMSA-style connectors can be attached directly to a radio-equipped helmet, or use the Speedcom Single-Ear Headset (sold separately).