Microset for Audio-Technica Unipak Wireless Systems Inconspicuous capsule diameter of just 2.5 mm, ideal for applications requiring minimum visibility Ergonomic under-ear designflexible, lightweight contoured loop hooks behind the ear Industry-standard sound quality Rugged construction designed for day-to-day use in production and theater settings 55" (1.4 m) terminated cable with locking 4-pin connector for A-T UniPak wireless systems