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. 3 modes: normal mode, medium noise reduction mode, noise reduction mode, for your choice, to meet your various needs. Compact and lightweight you will not feel uncomfortable after using this hearing aid for a long time. One-button operation you can easily switch the machine and adjust the volume and mode. (Long pre to switch the machine, short pre 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. Specifications: Material: ABS+silicone Color: blue Size: 3.48*1.7*0.85cm Weight: 4g Packing size: 13.7*9.8*4.5cm Using time: 20-24 hour Hearing Rehabilitation Training Knowledge Use instruction: