The V1-10282 2.5mm Straight Earphone Option from Otto Engineering is designed to work with the Evolution, Profile, & Storm Speaker Microphones.
Works in conjunction with speaker microphones to provide private communications
Each earphone kit has a lightweight earphone, rubber ear tip, and clothing clip
Quick disconnect earphone adapter for easy replacement of any single component
Low-profile, flexible, transparent acoustic tube
Flexible, high-grade 30" extended cable