Schuberth Dual Sound 3.5mm Ear Buds & Boom Mic - IMSAThe IMSA Schuberth Dual Sound 3. 5mm Ear Buds & Boom Mic IMSA connector features noise canceling earbuds and a microphone. With integrated speaker kits, you can improve your communication with high quality audio while maintaining comfort. These kits have built in helmet speakers within the noise reduction earcups and a boom style noise canceling microphone. The dual electronic kits also come with an earbud connector for use with earcup speakers.