Headworn Microphone with Screw Lock Mini Head-mounted Microphone for Lectures Broadcast Rooms Commentaries Guides Interviews Etc Feature: 1. Using highquality backpole electret capsule, with higher sensitivity and input sound pressure, the sound is clear and accurate. 2. Ultrasmall appearance, easy to clip on neckties, collars and clothes, not easy to attract attention when used, and strong concealment effect. 3. Can be used with any waistband wireless microphone and microphone power supply. 4. Suitable for lectures, TV stations, broadcast rooms, commentaries, guides, interviews and other case. 5. Lightweight design, comfortable to wear for a long time, with anti-sweat and dust-proof effects. Specification: Item Type: Head-mounted Microphone Material: Vacuum Tube Color: Beige Current: 0.5mA Signal to Noise Ratio: 56dB Weight: Approx.23g/0.8oz Monomer: Back Electret Type Directivity: UnidirectionalSingle Directivity Frequency Range: 50Hz-16KHz Sensitivity: -39dB1dB/0dB=1V/Paat1KHz Output Impedance: 68030%(at1kHz) Working Voltage: DC1.0V-10V Standard Power Supply: DC 1.5V Package List: 1 x Microphone 1 x Fixed Buckle _x000D_