Sensitivity 250um fiber @ 1550nm = -35dBm900um fiber @ 1550nm = -35dBm2.5mm fiber @ 1550nm = -30dBm max. Input + 5dBmWave response 800nm to 1700nm clamp loss <2.5db standard power AA alkaline battery or Ni-Mh battery frequency identification 270Hz / 1KHz / 2KHz fiber TypeDia. 250um / 900um / 2.5mm / 3mm SM Fiber Sound Yes Fiber Press <100KPSI Auto Power Off Yes