KIBVOE Rechargeable Digital Sound Amplifiers for Mini, Portable Sound Earbuds With Portable Charging BoxSuitable for Adults, Elderly, Children,1 Pair, Black

Digital Sound AmplifierKIBVOESound 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 loss choose Black. Easy to operateAutomatically 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 timeUsing 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 whistlingIf 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: 1064dBSPL Maximum Output: 115dBSPL Average Gain : 335dB Peak Gain : 385dB Frequency Range: 500Hz~4000Hz DistortionTHD500Hz 0.9% Total Harmonic DistortionTHD1600Hz 0.4% Total Harmonic DistortionTHD800Hz 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