This hearing aid is suitable for those who have hearing problems. It works like a speaker and fits perfectly in your ear! It is discreet and can easily be hidden behind your ear. It has the ability to adjust the sound volume according to your needs. It filters out unwanted noise caused by airflow and features advanced technology to reduce electromagnetic interference. Small, lightweight, and discreet to easily fit in your pocket or bag. Features: Sound sensitivity adjuster, Volume adjuster, ON-OFF switch. We can hear whispers from a distance of 30 meters. It operates with 1 AG13/LR44 battery (not included) and has a battery life of up to 120 hours of continuous operation.