Andoer Uni-Directional Head-mounted Headworn Headset Ear-hook Microphone Mic Flexible Wired Boom for Voice Amplifier Amp Loudspeaker Metal flexible boom to allow you to adjust the direction and angle according to your need. 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.