NANO SIGMA User Manual page 31

Tech
60
Specs
F1 ≤300 Hz
Frequency Range:
F2 ≥4000 Hz
THD at 500Hz: <3%
THD at 800Hz:
<3%
THD at 1600Hz <3%
Peak Gain: 38Db
HFA Full-on gain 29Db
HFA-OSPL90: 111dBSPL
Peak OSPL90: 122dBSPL
Eq. Input noise Lvl: <32dBSPL
<2.3 mA
Battery current drain
Battery Size:
A-13 Zinc