Digital Personal Sound Amplifier , Rechargeable for Adults with, Sound Amplifier Comfortable Wear, Portable Charging Case,a Pair Black

Has been committed to the research and development of Sound Amplifier Rechargeable for many years. At present, the latest DSP chip has been developed and used in our Sound Amplifier, which solves the problem of noise in the market and allows buyers to obtain better sound quality and affordable

【Digital Sound Amplifier】Sound Amplifier use the latest DSP chip technology noise reduction processing, the volume increase is up to 30dB-35dB, providing a clear listening experience, no transmission loss, making conversations more smooth, ideal for most mild to moderate sound loss choose Black. 【Easy to operate】Automatically turn on/off when entering and leaving the charging box, put on and use immediately, 5 seconds power-on delay can avoid the whistling sound in front of the ear, Touch to switch between 3 modes and 5 levels of volume depending on your needs. 【 Ergonomic design 】 The unique appearance design enhances the firm fit of Sound Amplifier, each person's ears are not the same, if you can not fit your ears, please replace the ear cap, we present three types of ear cap to provide buyers with a variety of choices 【Quick charge, long working time】 Using smart charging chip, magnetic charging efficiency is high. The amplifier can be fully charged within 2 hours and can be used for 45 hours. The charging box can be fully charged within 3 hours, and the charging box can be used to charge two Amplifier 3~4 times. 【How to solve whistling】 If there is a screeching or whistling sound from the Sound Amplifier, it is not a quality problem, but the earplug does not fit properly, or there is a problem with the wearing method. The Sound Amplifier comes with three different sizes of silicone earplug Specifications Amplifier battery: 45 mah Rechargeable case battery: 400 mah Charging time of amplifier: ≤2 hours Amplifier working time :≥45 hours The charging box charges the amplifier for 3~4 times Amplifier weight :3.9g / 0.14oz Charge case weight :34g / 1.19oz Average Output: 106±4dBSPL Maximum Output: ≤115dBSPL Average Gain : 33±5dB Peak Gain : 38±5dB Frequency Range: 500Hz~4000Hz Distortion（THD）500Hz ：0.9% Total Harmonic Distortion（THD）1600Hz ：0.4% Total Harmonic Distortion（THD）800Hz ：0.6% Equivalent Input Noise ≤12dB Rated Working Voltage of Amplifier: 3.7V Package List 2 × Amplifiers 8 × Silicone Ear Domes 10 × Dust proof Nets 1 × Charging Case 1 × Operation Guide 1 × Instruction manual 1 × USB Cable 1 × Cleaning Brus