1. Applicable to teaching amplifiers, waist pack machine, V section wireless microphone, U section wireless microphone and computer microphone. 2. This microphone directly plug in the microphone, notebook microphone interface. 3. Recording clear. 4. The microphone arm can be bent to adjust the position. 5. Small size, light weight, easy to carry. Connection plug: 3.5 mm Male Plug Microphone size: about 51mm Sensitivity: -40dB 2dB Directivity: Total directivity Sensitivity:-402dB Output lmpedance: less than equal 2.2k Operating voltage: 2.0V Frequency response:20-20KHZ Signal to noise ratio: 60dB Plug diameter: about 3.5 mm Colour:Photo Color Material:Metal + Rubber Package Contents: 1 x Microphone Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.