HP SOUND HP 71/Axon F-15 voice sound Adjustable Machine In the Ear Hearing Aid pocket model Hearing Aid with Extra Wire

Specifications:Maximum Saturation Sound Pressure: 129dB ± 4dB. Maximum File Acoustic Gain: 55dB ± 5db. Harmonic Distortion: ≤5%. Frequency Response: 450 - 3500Hz. Equivalent Input Noise: ≤ 30dB. Battery Type: AAA Button cell. Operating Voltage: 1.5V. Operating Current: ≤4mA. Size:  6.2 x 4.1 x 1.3cm / 2.4 x 1.6 x 0.5in(L x W x H).     Features:The hearing aid amplifier combines a cosmetically appealing look with the smooth sound an internal speaker. Filter out unwanted noise caused by airflow or wind. Deliver direct, powerful, and smooth sound right into your ear. Moisture resistant provides durability to most forms of moisture and wear. Separate wire and headphone, more convenient and safety. The Box hearing aid also provides improved technology for reduced electromagnetic interference. This digital Box  hearing aid is suitable for severe hearing loss people. Smaller than a credit card, this mini Box  hearing aid is discreet enough to fit easily in your pocket or handbag.