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. Microphone head size: 6.0x2.2mm High sensitivity anti-interference microphone core Sensitivity: -32dB1dB Directionality: omnidirectional Impedance: 2.2k 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: Package Contents: 2 x Lavalier Lapel Microphones 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.