Features:- Best sound amplifier in ear.- Light weight， easy and comfortable to wear.- Volume Adjustable.- Silicone earplugs in 5 different sizes， fit most ears.- With battery charger， and 1 cleaning brush.- Anti-shock， anti-drop， moisture proof， high temperature proof.- Help people with hearing impairment to hear sound and voice.Spec.:MaxSSPL(��4dB): 130Full-on-gain(FOG):(��5dB)46Equivalent input noise level(��dB):��28Harmonic distortion(%): ��4Power supply electric voltage(V): 1.2The sum settles electric current(mA): 1.6-2.5Continuoue wrok time(H) : ��10Battery Capacity(aAH): 40 Package include:In-Ear Hearing AidBatteryearplugManualBrush