The Audio2000"S® ACM137I is a miniature omni-directional condenser lavalier microphone specifically designed to meet the needs of professional broadcast and sound reinforcement applications. Ideal for string instruments.The ACM137I condenser lavalier microphone features a micro-miniature construction for unobtrusive vocal pick-up. Furthermore, a high quality back-electret condenser microphone element provides the ACM137I lavalier condenser microphone with excellent sensitivity and extremely wide frequency responses.A tie-clip is provided to have the ACM137I clipped to any article and set at any appropriate position. As a result, the ACM137I condenser microphone is a versatile, user-friendly, convenient, and reliable general purpose lavalier condenser microphone.