Features:1. This rechargeable hearing aid is equipped with imported speakers and microphones with high volume, clear sound quality, and can be used for both left and right ears. 2. The body is compact and lightweight, and you will not feel uncomfortable after using this hearing aid for a long time. 3. 3 modes: normal mode, medium noise reduction mode, noise reduction mode, for your choice, to meet your various needs.4. One-button operation is very simple, you can easily switch the machine and adjust the volume and mode. (Long press to switch the machine, short press to switch 3 modes.)USB charging design, built-in rechargeable polymer lithium-ion battery, which can provide 20-24 hours of working time when fully charged. Product Material :ABS+silicone Size :3.48*1.7*0.85cm Weight :4g Power Supply:USB Charging Battery capacity:30mAh lithium battery Maximum Sound Output:132dB+3dBMaximum Sound Gain:51dB5dBEquivalent Input Noise:29dB+3dBFrequency Range:300Hz~4500Hz Working Time:20-24Hours Package Included:1* Single Blue Host1* Earplug Tube Set2* Earplugs1* Cleaning Brush1* Tube1* USB Charging Cable1* English User Manual