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| 1.Dedicated preamplifier IC |
| 2.High-sensitivity drive |
| 3.Micro-tone collection |
| 1.Area:50~100m² (adjustable) |
| 2.Audio transmission distance:100m |
| 3.Sensitivity:-60dB±3dB |
| 4.Impedance:600Ω |
| 5.Signal amplitude:0 ~ 6Vp-p |
| 6.Frequency range:100Hz~15KHz |
| 7.Power supply:DC9V~12V 20mA |
| 8.Wire length:150mm |
| 9.Dimension:Ø80*38mm |