Max Sound Output: ≥127dB ± 4dB Max Sound Gain: 48dB ± 5dB Total Harmonic Distortion: ≤5% Frequency Range: 450~3500 hz Equiv Input Noise: ≤30 dB Battery: Lithium Battery Working Voltage DC 3.7V Working Current: ≤4mA Measurement: 4.35*2*1.3cm Special Function Key: Rechargeable,Adjustable Ear Hook Detailed Product Description: Volume Control Different size noise prevention earplug Good sound quality, 30 meters away Color: Black Weight: 9.5g Size: 4.35*2*1.3cm Warranty: 1 Year Certification: CE Battery: Lithium battery, its capacity is 70mAh Package Content : •1 x Hearing Aid •1 x Carrying case •1 x Charger (110-240v.) •3 x Earplugs •1 x User Instructional Brochure
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