Av-jefe Avl670-35 Earhook Black Mini Headset Microphone For Sennheiser Sweat and Dust-Proof Made Primarily for Indoor and Outdoor professionals Designed for Use on Stage, Houses of Worship, Lecturers and Other Applications Requiring Minimum Microphone Visibility with hand-free Operation Compatible with Sennheiser, Audio 2000, and Awisco Wireless Body pack Transmitter Provides High-Quality Voice Pickup & Ultra Light Weight, Easy Clip-on Style plus Bendable Boom for Comfortable Use Sweat-proof Design Provides Long Hours of Active Use