SPECIFICATION OF FiFINE K670:
Power Supply: 5V
Polar Pattern: Uni-directional
Frequency Response: 50Hz-15KHz
Sensitivity: -46±3dB(at 1kHz)
Output Impedance: 2200Ω
Equivalent Noise Level: 66dB-A
Max.SPL: 120dB(at 1kHz≤1% T.H.D)
S/N Ratio: 66dB
Operating Current: 13mA ± 2mA
Video : https://www.youtube.com/watch?v=fGGhNv-G-oQ
video : https://www.youtube.com/watch?v=iOCqkldhhRE
Amney kinsilam.. but bebohar kora hoi nah.. TK dorkar tai sell dicci.. na hole sell ditam nah