● Product Name : Xingma- XM 737T Hearing Aids Machine
● Product Code : SEL840
● Brand Name : Xingma
● Model Number : XM-707T
● Material:ABS
● Color:Beige
● Max sound output:133±4dB
● Sound gain:45±5dB(1000Hz)
● Total harmonic wave distortion:≤10%
● Input noise:≤35dB
● Frequency range:300~4500Hz
● Battery:AA
Xingma- XM 737T Hearing Aids Machine can be adjust volume to the minimum before wearing.Choose an earplug of slightly bigger size to avoid whistler.Increase volume gradually to avoid sudden increase in sound and make sure no air leakage and Keep the ear plug clean ,