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Product Name： Headset microphone 
Item No.： HM-13S 

HM Series headset microphone is ideally suited for vocal sound and speech application which  requires much freedom of movement.Especially the smallest size (the smallest capsule diameter of just 3.0mm)and lightest weight are ideal for application requiring minimum  visibility. Such as dance and sports instructors;Great for video use,this mini microphone is practically invisible.       

Direct connection Type(D  series)         HM-13S1/2/3   
L1   Standard 2.5mm single  plug          
L2   Standard 3.5mm stereo plug      
L3   Special thread  type 3.5mm plug      
L4   Sennheiser type 3.5mm stereo plug      
L5   AKG type 3-pin mini XLR      
L6   Shure type 4-pin XLR      
L7   Audio-technica  type 4-pin  mini XLR      
L8   Special usb plug       

Element:Back Electret Condenser       
Polar Pattern:Omni-directional /Uni-directional      
Frequency Response:20Hz- 20KHz /20Hz- 20KHz /50Hz-16KHz    
Sensitivity:-44dB± 3dB /-44dB± 3dB /-46dB± 3dB     
Output Impedance:2200Ω± 30%       
Max.Input SPL:130dB       
S/N Ratio:>70dB       
Power Supply:.5V-10V       
Cable:Φ1.5*1.2M       
Dimension:Φ3.5mm/Φ5mm /Φ7mm      
Color:Black, Skin or other       
Accessories:Windscreen