Detailed Product Description * Patent Miniature Microphone.* Shape from the Olympic torch,Slim design.* 3.5 jack,compatible with laptop and portable record equipment.* Tiny and convenient for using,can rotate 90°~180°.* directivity:unidirectional.* frequency response:50Hz-16Hz.* Sensitivity:-39±3DB.* S/N Ration:more than 58DB.* OEM orders are welcome