Max sound output: 110±5dB
Sound gain: 30dB Total harmonic wave distortion: ≤10% Frequency range: 300Hz-4000Hz Input noise: ≤40dB Voltage: DC1.5V Currentt: ≤4mA Battery: Zinc air A312 (Included) Type: 1: Single Hearing Aid, 2: Double Hearing Aids |