Wire: material, single-core shielded wire, very , length 1.5 metres, can be used for free movement. Microphone: microphone core is not easy to produce whistling, clear voice, suitable for a variety of mobile phone . Note: This microphone uses the CTIA standard, if your mobile phone is OMTP standard, it is recommended to use with an adapter to that it can be used properly.<br><br>Microphone head size: Φ6.0x2.2mm High sensitivity anti-interference microphone core Sensitivity: -32dB±1dB Directionality: omnidirectional Impedance: ≤2.2kΩ Operating voltage: 2.0V Frequency range: 100-16kHz Signal-to-noise ratio: 60dB Plug diameter: 3.5mm Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. Colour:Black Material:<br><br>Package Contents: 2 x Lavalier Lapel Microphones<br><br>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.