A39 TWS Hearing Aids for Seniors, Rechargeable Noise Cancelling Earbuds Gifts for Elder - White

• Using rechargeable lithium battery, durable, energy-saving, environmental protection
• In-ear ITE, good wearing concealment
• Small body, lightweight, easy to carry
• One-key switch and volume adjustment, easy to operate
• 6 levels of volume can be adjusted by one key
• Charging box design, convenient to charge anytime, anywhere
• With different sizes of ear tips, fit effortlessly conforms to the shape of your ears, greatly improving sound quality and keeping your hearing aids from falling out

Specification:

• Maximum OSPL90: ≤120dB+3dB
• High frequency average OSPL90: 108dB ± 4dB
• Equivalent input noise level: ≤29+3dB
• Total harmonic distortion: ≤10%
• Frequency response range: 400Hz~4500Hz
• Rated supply current consumption: ≤ 6mA
• Working hours: 12-15 hours
• Charging time: 90min-2 hours
• Working current (charging box): ≤20mA
• Working voltage (charging box): 3.7V
• Charging time (charging box): 90min
• Charging current (hearing aid): ≤10mA
• Charging voltage (hearing aid): 5V
• The number of times the hearing aid is charged by the charging box (both ears): 3-4 times
• Headphone built-in battery capacity: 20mA
• Charging box capacity: 300mAh