Harga di atas untuk 1 unit yaBerfungsi memperbesar volume suara sehingga pemakai dapat beraktivitas tanpa terganggu.Alat Bantu Dengar ini tipe BTE - Behind The Ear jadi tidak mudah terlepas saat pemakai beraktifitas sehari-hari.Tipe BTE ini lebih COCOK untuk anak-anak dan orang usia lanjut.Features:Maximum sound output: 130dB +/- 5dBSound gain: more than 50dBTotal harmonic distortion: less than 5%Frequency range: 300Hz ~ 40000HzInput Noise: less than 30 dBOperating voltage: 1.5VBattery model LR44 (included)Current: less than 4mAInstructions:The wire plug connected to the headset.Then earplug connector (hard) to the headset, earbuds (silica gel) to connect to the headphone connector pedestalThe battery installation: Gently open the battery compartment cover, put a AG13/LR44 battery into the battery compartment in the right direction, then close the battery compartment.Before you use this item, you have to turn the ON switch to OFF, and turn the sound volume to minimumThen put this item on you ear, keep it tightlyNext, turn this item on (O-N to N), adjust the volume until you hear clear sound.Package:- Hearing Aid / Alat Bantu Dengar- Ear Cap 3 Ukuran- Baterai 3pcs- Instruksi Pemakaian dengan Bahasa Inggris.