Product description Our company is a China professional electroacoustic manufacturer factory with 50 years history. in the production of electroacoustic device accessories. We can supply you directly, and of course our prices will also be competitive. In addition to microphone,buzzer,speaker,siren/alarm,Receiver etc. are our main supplies. Product Name wholesale Custom Dynamic Anti-noise Mini Mic oem Product picture Characteristics Product Features *Brand Huasheng *Part number MDM-4 *Dimension 36*12.5mm *Close-talking sensitivity 0.35~0.9mV/Pa(at 1000Hz) *AC Impedance at 1KHz 250~350ohm *Resistance 180+/-50ohm *Operating Temperature -50~+60℃ *Extreme Temperature -60~+70℃ *Packing 500pcs/carton *Carton size 42*34*25cm Drawing