Battery Sold International， a battery of your life!Features:100% Brand New and High QualityIncrease volume gradually to avoid sudden increase in sound. Pocket design for portability.Anti-shock and anti-drop， user-friendly design.Super mini size and light weight.Reduce noice， provides good sound quality.Durable and reliable for long time use.Silicone earplugs in 4 sizes， fit most ears.Increase volume gradually to avoid sudden increase in sound. Specifications:Max sound output: 110?��5dBSound gain: ?Y30dBTotal harmonic wave distortion: ?��10%Frequency range: 300-4000HzInput noise: ?��40dBBattery Required: 2 x AG3 Button Cells(NOT included)Voltage: DC 1.5VCurrent: ?��4mA Color: As picturesPackage includes:1 * Hearing Aid(with one earplug) 1 * Carrying Case 3 * Silicone Adjustable Tips1 * BrushPurchasing here， fulfill your dream!