Andoer Uni-Directional Mini Ear-hook Headset Microphone Mic for Voice Amplifier Amp Loudspeaker Uni-Directional pickup design can effectively reduce the noise of the surrounding environment. Ear hook design for better use. Headset style microphone with 3.5mm male connection. Works with voice amplifier. Designed for use on stage, houses of worship, presenters, lecturers and other situations requiring minimum microphone with hand-free operation.