Hearing Aid Suitable Upto 50% Hearing Loss. Battery Type :P 675 Package Contents: 2 Piece Ear Amplifier With 6 made in Germany Batteries Size P 675 [ 2 in each hearing aid + 4 in the box ] 3 Ear Plugs in each box[1 in hearing aid and three sizes small, Medium and Large], Instructions Manual. Please read the operation/manual instruction before using the product. Suitable For Normal To Moderate, Maximum Power Output 130 dB SPL, Frequency Range 300-4000 Hz. In case any problem with Hearing Aid, you can write to us directly and get your problem /grievances addressed immediately. Use - contact seller option to raise your concern.