Product Name： Headset microphone 

Item No.： HM-31S 

      HM Series headset microphone is ideally suited for vocal sound and speech application which  requires much freedom of movement. 

      Especially the smaller 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.

     L1: Standard 3.5mm single(double) plug

    L2: SENNHEISER type 3.5mm stereo plug

    L3: Special thread type 3.5 single plug

    P3: AKG type 3pin mini XLR(3p)or other

    P4: SHURE type 4pin mini XLR(4p)or other

HM-31S-1/2/3/4

Element:Back Electret Condenser

Polar Pattern:Omni/Omni/Uni/Uni-directional

Frequency Response：20Hz- 20KHz/20Hz- 20KHz/50Hz- 16KHz/50Hz- 16KHz  

Sensitivity:-42dB/-46dB/-53dB/-45dB± 3dB

Output Impedance：2200Ω± 30%

Max.Input SPL：130dB

S/N Ratio:>70dB

Power Supply:1.5V-10V

Cable:Φ1.5*1.2M

Dimension:Φ3.5mm/Φ5mm/Φ5mm/Φ7mm

Color:Black, Skin or other

Accessories:Windscreen