•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 Package included: •1 Pair x Hearing Aid Earbuds •6 x Ear Tips •1 x Charging Box •1 x USB Cable •1 x English User Manual