ITEM NAME:Portable Lightweight Wired 3.5mm Plug Guide Lecture Speech Headset with Mic A#S Product Description Description: Features: Suitable for lecture, teaching, speech, etc. 3.5mm Plug. Clear sound recording. Mini size, lightweight and portable. Flexible mic, adjust to your ideal angle. Nylon braided durable wire body. Specification: Mic Size: 6 X 5 mm Sensitivity: -52dB ±3dB Directivity: All Impedance: ≠¤2.2kohm Frequency Range: 100Hz-16KHz SNR: >60dB Wire Length: approx. 1 m/3.28 ft Included: 1 X Lecture Headset with Mic.Suitable for lecture, teaching, speech, etc. Included:1 X Lecture Headset with Mic. Flexible mic, adjust to your ideal angle. Mic Size: 6 X 5 mm. Sensitivity: -52dB ±3dB. Mini size, lightweight and portable.