Hearing Aid T30 Mini Digital Wireless Invisible Hearing Aid Sound Amplifier Smart Programmable FDA Approved Elderly Young Deaf Deaf Back Invisible

T30 is non-programmable instantfit CIC hearing aid. Based on DSP systems, 10 channels WDRC and digital signal processing, can provide your hearing clear and comfortable. No matter you are in quite, noisy, outdoor or phone environment, it will keep you listen clearly.Note:--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.--If you hear a howling, check the ear (silica gel) is appropriate and whether the size of plug is tight, the appropriate choice of earplugs and plugged, make sure no air leakage.--Keep the ear plug clean.--Remove the battery if you do not use it for long time.