chnical Specifications:
Operating temperature: -40℃～+55℃
Dimensions: 139mm×72mm×34mm
Weight≤250g
Frequency range: 200Hz～4000Hz
Operating voltage: 12V DC
Impedance: 450(1±15%)Ω (1000Hz)
Average sensitivity : （84～168mV/Pa）can be adjusted between 1.5mV/Pa and 400mV/Pa
S/N≥10dB (12V DC is added, when it is 1000Hz)