What kind of batteries do I need for my Alterion Digital Hearing Amplifier?

The product requires three LR44 Button cells (included in the package).

Will this product help me reduce tinnitus?

Yes, the product is very effective for reducing the symptoms of tinnitus. 

Is it going to be suitable for my ears?

The product comes with three size domes, small, medium and large, you may feel free to select the one that fits you best.