Axon X-168 hearing aid amplifier device has 129dB ± 4dB maximum saturation sound pressure, maximum file acoustic gain 50dB ± 5db,
harmonic distortion ≤5%, frequency response 450 - 3500 Hz,
equivalent input noise ≤ 30dB, AG 13 button cell battery,
operating voltage 1.5V, operating current ≤4mA, size 5.3 x 4.4 x 1.0 cm.