Pocket body hearing aid, can be easily wear in the belts, trouser pockets and other places
Corresponding uncomfortable threshold properly adjust the maximum output, protect ear
3 different shape earplugs are provided, which can fit different people's ear; AA battery, long using time, easy to purchase
1-9 volume control, high output, high frequency, suitable for moderate and severe hearing loss
Frequency adjustment function, "I" is ON switch, "0"is OFF switch. "H1", high frequency, can help you reduce low frequency noise, "H2", more high frequency, can help you reduce low frequency noise than h1