Feature: 1. Low power consumption, high-fidelity material, fine quality chip, with stereo sound quality. 2. Soft silicone material, will not harm your ear, and also ensure stability and lasting. 3. This affordable sound amplifier have volumes controls, you can adjust the volumes to fit your own needs and preferences. 4. It also has a noise reduction feature that helps the user hear with maximum clarity. 5. Ergonomic design earcanal simulator, will not feel uncomfortable even after long time wearing. 6. Designed with recharging bag, large recharging capacity, the power level of the recharging compartment is visible. 7. Easy carrying, more beautiful, easy to carry, and anti-lost. Specification: Specifications: Name: Sound Amplifier Model: BX-04 Color: Silver Type: 2pcs Recharing box: 1 * 1.2V, 600mah battery (included) Hearing amplifiers: 2 * 1.2V, 45mAhbattery (included) Maximum sound output: 129±3dB Sound gain: ≥40±5dH Total harmonic-wave distortion: ≤10% Input noise: ≤32dB Frequency-range: 450Hz-3400Hz Voltage: DC1.2V Current: ≤2mA Package size: 150 * 80 * 42mm / 5.91 * 3.15 * 1.65in Package weight: 185g / 6.26ounce . Package List: 2 * Sound Amplifier 6 * Earplug 1 * Recharging Bag 1 * Cleaning Brush 1 * USB Cable 1 * Manual