portable lightweight 3.5mm wired class presentation amplifier speaker microphone headset muitifunction microphone

features: 1.18m nylon weaving wire, reliable for your normal using. soft rubber tube frame, no pressure to your head. suitable for connecting voice amplifier or pc microphone port. flexible microphone holder arm, adjust to your ideal angle. lightweight, easy and convenient to carry. specification: microphone size: approx. 0.6 x 5 mm/0.0024 x 0.2" sensitivity: -52db±3db direction: single