Each package only have one hearing aid, It could be worn on both left and right ear . So , if you want wear a pair of hearing aids , you could buy two products . Features: 1.Brand new and high quality invisible hearing aid sound amplifier 2.Super mini size and light weight, not easily to be seen 3.Adjust volume to the minimum before wearing 4.Increase volume gradually to avoid sudden increase in sound 5.Convenient for watching movie, enjoying the drama, attending meeting, or having class, it could help you hear the sound clearly and loudly .