Name: Rechargeable Hearing Aid Headphones Item Type: Ear Care Model: hearing aid The sound amplifier helps to amplify up to 30 times the sound with low background noise. Built-in battery for easy charging. No battery replacement is required for replacement. The best hearing keeps the earplugs clean and replaced. Interchangeable earplugs seal the noise. Charging time: . 3 hours Working time: 8-10 hours less than 28db 100-4000Hz Voltage 1.2V gain 30 dB Operating current less than 3mA distortion less than 6% colour:complexion Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Material:plastic size:14.5 * 6 * 10.5 cm Package Contents: 1* host 1* charging cable 1* charging base 1* brush 6* earplugs 1* English manual Note: Please insert the product directly into the black box of the product, do not use electricity. Plug the power supply into the DC jack and charge the black box on the lantern. Keep using it for a long time, during the day, don't worry that he 't have no electricity. Select the earbud that is right , then switch to the ON state and turn the volume switch to dB. When you put down to sleep or take a bath, it turn off the OFF state, which can be used for a long time. Do not place the product in water or in a damp place. Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.