Sound Enhancement Amplifier Behind The Ear Hearing.AXON HEARING AID F138.

F-138 is a small BTE hearing aid, it's comfortable for wearing and invisible. * great promotion hearing aid *On/off switch *Volume control *Max Sound gain up to 50dB *Battery type: AG13 Button Battery or A675(Zinc Air Battery) *Different size noise prevention earplug for you selection *Clear and loud voice *CE approval