1. Accessories: Main unit (1 piece), batteries (3 pieces), earplugs (3 pieces), English instruction manual 2. Maximum Output: ≤ 125 + 5 dB 3. Sound Gain: 40±5 dB Harmonic distortion: ≤ 10% 5. Equivalent Input Noise Level: ≤45 dB Frequency Range: 200--3200 Hz Battery Voltage: DC 1.5 V 8、Directionality: Omnidirectional
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