Item Type: Wired Microphone Material: Aluminum Alloy Radio Head Type: Dynamic Frequency Range: 50-18000Hz Sensitivity: 2.5mV/Pa Maximum Sound Pressure Level: 140 DB SP.L Wireless: Wired Channel Type: Mono Microphone Use: Singing, Meeting, etc. Cable Length: Approx. 3m/9.8ft 1、The use of high quality metal mesh head can effectively convert sound into audio signal, eliminate noise, and can effectively prevent falling.  2、Use 6.35mm/0.25in plug, support multi device universal and use high fidelity microphone, clear sound.  3、Suitable for home K song, computer, speakers, TV, car speakers, mobile speakers  4、Superior construction of the mic cable can isolate external electromagnetic interference and make the sound transmission more clearly.  5、No battery required for operation, an external on/off switch on it for easy control of audio.